CN101432762B - Signal transmission method, transmission/reception device, and communication system - Google Patents
Signal transmission method, transmission/reception device, and communication system Download PDFInfo
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- CN101432762B CN101432762B CN2007800149724A CN200780014972A CN101432762B CN 101432762 B CN101432762 B CN 101432762B CN 2007800149724 A CN2007800149724 A CN 2007800149724A CN 200780014972 A CN200780014972 A CN 200780014972A CN 101432762 B CN101432762 B CN 101432762B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/14—Channel dividing arrangements, i.e. in which a single bit stream is divided between several baseband channels and reassembled at the receiver
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Abstract
It is an object of the invention to inhibit a drop in the data transmission efficiency due to the transmission of an interrupt signal. The invention provides a signal transmission method that is characterized in that a reception side and a transmission side partition data into a plurality of data fragments and send and receive the plurality of data fragments over at least two transmission lines, in that the transmission side transmits first data fragments of the plurality of data fragments over a first transmission line of the transmission lines, transmits data packets that include header information, a second data fragment that has the same bit length as the first data fragments, and footer information over a second transmission line other than the first transmission line, and transmits the first data fragments and the second data fragments in synchronization, and in that an interrupt signal for controlling the transmission side is transmitted from the reception side to the transmission side in a time slot that is an interval between first data fragments that are adjacent on the first transmission line.
Description
Technical field
The present invention relates to method of communicating signals, transceiver and communication system that data transmit.
Background technology
Between transceiver, carry out in the communication system of data transmission; Have with USB (Universal Serial Bus); IEEE (Institute of Electrical and ElectronicsEngineers) 1394 is representative; Between transceiver, have the communication system of the transmission lines (be called data-signal below and use transmission lines) that one or more data-signals use or the communication system of the transmission lines (be called control signal below and use transmission lines) that data-signal is used with transmission lines and control signal.In the former communication system, use transmission lines via data-signal, between transceiver, carry out the transmission of data, carry out the transmission of various control signals of the transmission beginning, end etc. of data with transmission lines via control signal.In addition, also have in order to improve the efficient that data transmit, the situation that the transmission lines that adopts control signal to use with transmission lines and data-signal is carried out the transmission of data.
An instance of such communication system is disclosed in patent documentation 1.In this communication system, adopt data-signal to use transmission lines, or adopt data-signal to use transmission lines with transmission lines and control signal, carry out data continuously and transmit.In patent documentation 1, disclose and so transmitting continuously in the transmission lines of data, adopt timesharing multiplex method, will send to the technology of transmitter side as the interrupt request singal of control signal receiver side from data.In timesharing multiplex method, to a plurality of transceivers, during the distribution transmission lines was spendable, transmitter side and receiver side alternately adopted data-signal to use transmission lines with transmission lines and control signal.Here, receive from transmitter side the process of data at receiver side, when interrupt request singal is sent to transmitter side, be used to during between the data of transmitter side and the data, promptly to distribute to receiver side during, interrupt request singal is sent to transmitter side.So receiver side can send to transmitter side with interrupt request singal at any time and immediately.
Patent documentation 1:JP speciallys permit instructions No. 2733242
But, in the timesharing multiplex method of patent documentation 1, in order at any time and immediately interrupt request singal to be sent to transmitter side, need be between data and data from transmitter side, guarantee to be used to transmit look-at-me during.That is, between data and data from transmitter side, need guarantee to be equivalent to look-at-me bit length or its above bit length during.Consequently, reduce the efficient from the data transmission of transmitter side, the speed that transmits in data will improve from now on day by day, become bigger problem.
So, the object of the present invention is to provide method of communicating signals, transceiver and the communication system that can suppress by the reduction of sending the data-transmission efficiency that look-at-me causes.
Summary of the invention
In order to solve above-mentioned problem; Invention 1 provides a kind of signaling method; It is characterized in that receiver side and transmitter side are divided into a plurality of data slots via the transmission lines more than at least 2 with data; Send reception; Above-mentioned transmitter side transmits the 1st data slot in above-mentioned a plurality of data slots via the 1st transmission lines in the above-mentioned transmission lines, will comprise heading message, transmitted via the 2nd transmission lines beyond above-mentioned the 1st transmission lines by the packet of the 2nd data slot that forms with the identical bit length of above-mentioned the 1st data slot, footnote information; And synchronously transmit above-mentioned the 1st data slot and above-mentioned the 2nd data slot; At the time slot as the interval between above-mentioned the 1st data slot of the adjacency of above-mentioned the 1st transmission lines, the look-at-me that will be used to control above-mentioned transmitter side sends to above-mentioned transmitter side from above-mentioned receiver side.
In the present invention, in the 1st data slot, not additional header and footnote signal.Transmitter side utilizes the heading message and the footnote information of the packet of the 2nd transmission lines, makes the 2nd data segment sync of the 1st data slot and packet, and sends to receiver side.At this moment, the time slot between the 1st data slot of the adjacency of the 1st transmission lines is compared with the interval between the packet of the 2nd transmission lines, only grows the bit length of footnote information and heading message.According to the present invention owing to utilize this time slot, send look-at-me, during the other purposes that should guarantee so be no longer necessary for the transmission look-at-me, perhaps can shorten other purposes during.Thus, time slot capable of using, the reduction of the transmission efficiency of the data that inhibition transmission look-at-me causes.In addition, owing to time slot does not transmit during the data slot, so can prevent the loss of data slot.
In addition, the present invention is applicable to for example, and receiver side and transmitter side are the situation of host terminal and scratch pad memory equipment.For example, at host terminal via the 1st and the 2nd transmission lines, from scratch pad memory equipment, when reading read data, applicable to the time slot that adopts the 1st transmission lines, when look-at-me is sent to scratch pad memory equipment.In addition, scratch pad memory equipment is from host terminal, via the 1st and the 2nd transmission lines, receives and during the storage write data, also applicable to the time slot that adopts the 1st transmission lines, look-at-me sent to the situation of host terminal.
Added in the 1st data slot of the adjacency in the 1st transmission lines under the situation of footnote information, time slot grows the bit length of heading message than the interval between the packet.In addition, in the 1st data slot, added under the situation of heading message, time slot grows the bit length of footnote information compared with the interval between the time bag.Owing to utilize this time slot to send look-at-me, during the other purposes that should guarantee so be no longer necessary for the transmission look-at-me, maybe can shorten other purposes during.Thus, time slot capable of using, the reduction of the transmission efficiency of the data that inhibition transmission look-at-me causes.
Can suppress the reduction of the transmission efficiency of data on one side, Yi Bian stop from the 1st data slot of transmitter side and the transmission of packet.
The present invention realizes and invents 1 identical action effect.
The 1st data slot that is sent during reception that can be through end interrupt signal and the transmission of packet, the 1st data slot in preventing to send and the transmission of packet do not finish and situation about destroying.
The present invention realizes and invents 1 identical action effect.
The present invention realizes and invents 1 identical action effect.
Transmitter side sends to receiver side according to the 1st clock that sends from receiver side with data slot.Here, receiver side stops the supply of the 1st clock, and thus, transmitter side can't send to receiver side with data slot.So, receiver side may command stopping from the transmission of the data slot of transmitter side.
According to foregoing invention,, then stop transmission from the data slot of transmitter side if receiver side stops the supply of the 1st o'clock clockwise transmitter side.So, receiver side stops to control to the transmission of data fragment, and look-at-me and the 2nd clock are sent to transmitter side.That is, receiver side can send look-at-me and the 2nd clock in time arbitrarily, between data slot, needn't be provided in advance sending look-at-me and the 2nd clock during.Thus, the interval between the data slot can be shortened, the reduction of the transmission efficiency of data can be suppressed.In addition, can after the transmission that stops from the data slot of transmitter side,, send look-at-me and the 2nd clock via the transmission lines that transmits data slot.Thus, can prevent the loss of data slot.
In addition, also can be sent in the packet that has added footnote information and heading message in the data slot via transmission lines.Equally at this moment, also can shorten the interval between the packet, can suppress the reduction of the transmission efficiency of data according to aforesaid reason.
In addition, the present invention is applicable to for example, and receiver side and transmitter side are the situation of host terminal and scratch pad memory equipment.For example, can be used at host terminal via transmission lines, from scratch pad memory equipment, when reading read data, host terminal stops the supply of the 1st o'clock clockwise scratch pad memory equipment.Then, host terminal sends to scratch pad memory equipment via the 1st transmission lines with look-at-me, via the 2nd transmission lines, the 2nd clock is sent to the situation of scratch pad memory equipment.
Can suppress the reduction of the transmission efficiency of data on one side, Yi Bian stop transmission from the data slot of transmitter side.
Invention 11 provides a kind of method of communicating signals, and it relates to invention 8, it is characterized in that; Above-mentioned receiver side is after the transmission that stops above-mentioned the 1st o'clock clockwise transmitter side; The output interrupt request, so that control above-mentioned transmitter side, above-mentioned transmitter side has the internal clocking that the reception of count value through above-mentioned the 1st clock resets; Stop to make the situation of the count value of above-mentioned internal clocking according to transmission, discern above-mentioned interrupt request above setting because of above-mentioned the 1st clock.
According to foregoing invention,, then stop transmission from the data slot of transmitter side if receiver side stops the supply of the 1st o'clock clockwise transmitter side.So, the transmission of receiver side control data fragment stops, thus, and transmitter side identification interrupt request.That is, receiver side can be at any time, lets transmitter side, the identification interrupt request, between data slot, needn't preestablish be used to discern interrupt request during.Thus, the interval between the data slot can be shortened, the reduction of the transmission efficiency of data can be suppressed.
In addition, also can be sent in the packet that has added footnote information and heading message in the data slot via transmission lines.Equally at this moment,, can shorten the interval between the packet, suppress the reduction of the transmission efficiency of data according to above-mentioned reason.
In addition, the frequency of the internal clocking of transmitter side is set according to the frequency that is lower than the 1st clock.
In addition, the present invention for example can be suitable for, and receiver side and transmitter side are the situation of host terminal and scratch pad memory equipment.For example, applicable at host terminal via transmission lines, from scratch pad memory equipment, when reading read data, the supply through the 1st clock stops, and lets the situation of scratch pad memory recognition of devices interrupt request.
Invention 12 provides a kind of method of communicating signals, and it relates to invention 11, it is characterized in that, above-mentioned interrupt request is the request that is used to stop the transmission of above-mentioned data slot.
Can suppress the reduction of the transmission efficiency of data on one side, Yi Bian stop transmission from the data slot of transmitter side.
The present invention realizes and invents 8 identical action effects.
Invention 14 provides a kind of transceiver, and it relates to invention 13, it is characterized in that above-mentioned transmission lines is at least more than 2; Above-mentioned data sending part comprises the 2nd clock acceptance division, and it is via above-mentioned transmission lines more than at least 2, according to above-mentioned the 1st clock; Above-mentioned data slot is sent to above-mentioned receiver side; Via the 2nd transmission lines in the above-mentioned transmission lines,, receive the 2nd clock from above-mentioned receiver side; The look-at-me acceptance division; It via the 1st transmission lines in the above-mentioned transmission lines, receives the look-at-me that is used to control above-mentioned transmitter side according to above-mentioned the 2nd clock from above-mentioned receiver side; After the transmission that stops from above-mentioned the 1st clock of above-mentioned receiver side; Above-mentioned the 2nd clock acceptance division receives above-mentioned the 2nd clock, and above-mentioned look-at-me acceptance division receives above-mentioned look-at-me according to above-mentioned the 2nd clock.
The present invention realizes and invents 9 identical action effects.
Invention 15 provides a kind of transceiver, and it relates to invention 14, it is characterized in that also comprise and reply sending part, it will be replied and send to above-mentioned receiver side according to the reception of above-mentioned look-at-me.
The present invention realizes and invents 11 identical action effects.
Invention 17 provides a kind of transceiver, and it relates to invention 16, it is characterized in that also comprise and reply sending part, it will be replied and send to above-mentioned receiver side according to the identification of above-mentioned interrupt request.
Invention 18 provides a kind of transceiver; It is from transmitter side, and reception is divided into the data that a plurality of data slots transmit, and it is characterized in that; Comprise: the 1st clock sending part; It is used for above-mentioned transmitter side on the 1st clock of the transmission of above-mentioned data slot, with transmitting the road, sends to above-mentioned transmitter side via clock signal; And data reception portion; It according to above-mentioned the 1st clock, receives above-mentioned data slot from above-mentioned transmitter side via transmission lines; Above-mentioned the 1st clock sending part stops the transmission of above-mentioned the 1st o'clock clockwise transmitter side, so that stop the transmission from the above-mentioned data slot of above-mentioned transmitter side.
The present invention realizes and invents 8 identical action effects.
Invention 19 provides a kind of transceiver, and it relates to invention 18, it is characterized in that; Above-mentioned transmission lines is at least more than 2; Above-mentioned data reception portion according to above-mentioned the 1st clock, receives above-mentioned data slot from above-mentioned transmitter side via above-mentioned transmission lines more than at least 2; This transceiver comprises: look-at-me generation portion, and its generation is used to control the look-at-me of above-mentioned transmitter side; The look-at-me sending part, it sends to above-mentioned transmitter side via the 1st transmission lines in the above-mentioned transmission lines with above-mentioned look-at-me; With the 2nd clock sending part; It sends to above-mentioned transmitter side via the 2nd transmission lines in the above-mentioned transmission lines with the 2nd clock, after above-mentioned the 1st clock sending part stops the transmission of above-mentioned the 1st o'clock clockwise transmitter side; Above-mentioned look-at-me sending part is via above-mentioned the 1st transmission lines; Above-mentioned look-at-me is sent to above-mentioned transmitter side, and above-mentioned the 2nd clock sending part sends to above-mentioned transmitter side via above-mentioned the 2nd transmission lines with the 2nd clock.
The present invention realizes and invents 9 identical action effects.
Invention 20 provides a kind of transceiver; It relates to invention 18; It is characterized in that; Also comprise interrupt request notice portion, it is through controlling above-mentioned the 1st clock sending part according to the mode of the transmission that stops above-mentioned the 1st clock, and the interrupt request that will be used to control above-mentioned transmitter side is notified to above-mentioned transmitter side.
The present invention realizes and invents 11 identical action effects.
Invention 21 provides a kind of communication system, and it comprises invention 13 described transceivers, with invention 18 described transceivers.
The present invention realizes and invents 8 identical action effects.
Invention 22 provides a kind of method of communicating signals; It is characterized in that receiver side and transmitter side are divided into a plurality of data slots with data and send reception via transmission lines; Above-mentioned receiver side is between the above-mentioned data slot of the adjacency of above-mentioned transmission lines; Change the signal amplitude of above-mentioned transmission lines, notify to above-mentioned transmitter side so that will be used to control the interrupt request of above-mentioned transmitter side, above-mentioned transmitter side detects the variation of above-mentioned signal amplitude.
According to foregoing invention, the transmitter side of data can pass through the variation of the signal amplitude of supervision transmission lines, and identification is from the interrupt request of receiver side.Here, receiver side changes signal amplitude between the data slot of adjacency, the notice interrupt request.For the look-at-me that will be used to control transmitter side from receiver side; Send to transmitter side; Between data slot; Need look-at-me the bit length degree during, but according to the Notification Method of interrupt request of the present invention, needn't be during the bit length degree that look-at-me is set between the data slot.Thus, can suppress to notify the reduction of the transmission efficiency of the data that interrupt request causes.In addition, owing to do not transmit during the data slot between the data slot, so can prevent the loss of data slot.
In addition,, for example, enumerated, the terminal resistance of transmission lines has been become the method for the 2nd resistance value from the 1st resistance value at receiver side as the method that changes the signal amplitude in the transmission lines.
In addition, also can be in data slot, additional header and/or footnote information.
Also have, the present invention is applicable to for example, and receiver side and transmitter side are the situation of host terminal and scratch pad memory equipment.For example, applicable at host terminal via transmission lines, from scratch pad memory equipment, when reading read data, utilize between the data slot, notify situation with interrupt request to scratch pad memory equipment.In addition, also applicable at scratch pad memory equipment from host terminal, via transmission lines, receive and during the storage write data, utilize between the data slot, notify situation with interrupt request to host terminal.
Invention 23 provides a kind of method of communicating signals, and it relates to invention 22, it is characterized in that, above-mentioned interrupt request is the request that is used to stop the transmission of above-mentioned data slot.
Can suppress the reduction of the transmission efficiency of data on one side, Yi Bian stop transmission from the data slot of transmitter side.
Invention 24 provides a kind of transceiver, it is characterized in that, comprising: data generation portion, and it is divided into a plurality of a plurality of data slots that generate with data; The data sending part; It is with above-mentioned data slot; Via transmission lines, send to receiver side: with the interrupt request identification part, it passes through between the above-mentioned data slot of the adjacency of above-mentioned transmission lines; Detect the variation of the signal amplitude of above-mentioned transmission lines, discern interrupt request from above-mentioned receiver side.
The present invention realizes and invents 22 identical action effects.
In addition, signal amplitude value and the regulation of interrupt request of the present invention identification part through transmission lines relatively discerns interrupt request with reference to amplitude.For example, when the signal amplitude value of transmission lines during greater than the reference amplitude value of regulation, interrupt request identification part nonrecognition interrupt request.On the other hand, when the signal amplitude value of transmission lines during less than the reference amplitude value of regulation, interrupt request identification part identification interrupt request.
In addition, the data sending part adopts the clock of regulation, and the transmission with data slot sends to receiver side.Here, the interrupt request identification part adopts the clock of the frequency identical with the clock of regulation to come the detection signal oscillation amplitude change.
Invention 26 provides a kind of transceiver, it is characterized in that, comprising: data reception portion, and its a plurality of data slots that partition data is formed receive from transmitter side via transmission lines; Interrupt request notice portion, this interrupt request notice portion changes the signal amplitude of above-mentioned transmission lines through between the above-mentioned data slot of the adjacency of above-mentioned transmission lines, and the interrupt request that will be used to control above-mentioned transmitter side is notified to above-mentioned transmitter side.
The present invention realizes and invents 22 identical action effects.
In addition, interrupt request notice portion for example, the terminal resistance through with the transmission lines of receiver side becomes the 2nd resistance value from the 1st resistance value, changes the signal amplitude in the transmission lines.
Invention 27 provides a kind of communication system, and it comprises invention 24 described transceivers and invention 26 described transceivers.
The present invention realizes and invents 22 identical action effects.
According to the present invention, method of communicating signals, transceiver and the communication system of the reduction of the inhibition transmission data-transmission efficiency that look-at-me causes can be provided.
Description of drawings
Fig. 1 is the one-piece construction figure of the communication system of the 1st embodiment example of the present invention;
The sequential chart of the appearance that the data when Fig. 2 reads for expression transmit;
Fig. 3 is the functional structure chart of CPU130 of CPU110 and the SD storage card 102 of host terminal 101;
The process flow diagram of an instance of the flow process of the processing of Fig. 4 during for the reading of communication system of this embodiment of expression;
The process flow diagram of an instance of the flow process of the processing of Fig. 5 during for the writing of communication system of this embodiment of expression;
Fig. 6 is the one-piece construction figure of the communication system of the 1st routine embodiment of the 2nd embodiment of the present invention;
Fig. 7 is the one-piece construction figure of the communication system of the 2nd routine embodiment of the 2nd embodiment of the present invention;
The sequential chart of the appearance that the data when Fig. 8 reads for expression transmit;
The sequential chart of the appearance that the data when Fig. 9 is reading of expression the 1st embodiment transmit;
Figure 10 is the functional structure chart of CPU230 of CPU210 and the SD storage card 202 of host terminal 201;
The process flow diagram of an instance of the flow process of the processing of Figure 11 during for the writing of communication system of expression the 1st embodiment;
The sequential chart of the appearance that the data when Figure 12 is reading of expression the 2nd embodiment transmit;
Figure 13 is the functional structure chart of CPU230 of CPU210 and the SD storage card 202 of host terminal 201;
The process flow diagram of an instance of the flow process of the processing of Figure 14 during for the writing of communication system of expression the 2nd embodiment;
Figure 15 is the one-piece construction figure of the communication system of the 3rd embodiment example of the present invention;
The sequential chart of the appearance that the data when Figure 16 reads for expression transmit;
Figure 17 is the structural drawing of motional impedance circuit 417;
Figure 18 is the structural drawing of potential difference (PD) testing circuit;
Control signal when Figure 19 reads interrupt request for expression output is with the process flow diagram of the state of the state of transmission lines 406 and break detection signal;
Figure 20 is the key diagram of explanation control signal with the output state of transmission lines 406, motional impedance circuit 417, potential difference (PD) testing circuit 439 and break detection signal etc.;
Figure 21 is the functional structure chart of CPU430 of CPU410 and the SD storage card 402 of host terminal 401;
The process flow diagram of an instance of the flow process of the processing of Figure 22 during for the reading of communication system of this embodiment of expression;
The process flow diagram of an instance of the flow process of the processing of Figure 23 during for the writing of communication system of this embodiment of expression;
Figure 24 is another structural drawing of potential difference (PD) testing circuit;
Figure 25 is explanation control signal another key diagram with the output state of transmission lines 406, motional impedance circuit 417, the potential difference (PD) testing circuit 439 that in Figure 24, constitutes and break detection signal;
Figure 26 is the one-piece construction of the communication system of the routine variation of this embodiment;
Figure 27 is the structural drawing of the structure of expression comparer;
Figure 28 is for explaining control signal with transmission lines 406, the key diagram of the output state of comparer 441 and break detection signal etc.
Among the figure:
101,201,401: host terminal;
102,202, the 402:SD storage card;
105,205,405: clock signal is used transmission lines;
106,206,406: control signal is used transmission lines;
107,207,407: data-signal is used transmission lines;
110，130，210，230，410，430：CPU；
150: clock generation portion;
151: the clock sending part;
152,172,252,272,452: moment control part;
153,173,453,473: time slot acquisition portion;
154,174,254,274,454,474: the parameter storage part;
155,175,255,275,355,455: order generation portion;
156,176,256,276,456: the order sending part;
157,177,257,277,457,477: the order acceptance division;
158,258,458: reply acceptance division;
178,278,478: reply sending part;
159,259,459: read data generation portion;
179,279,379,479: the read data sending part;
160,260,460: the read data acceptance division;
161,180,261,280,461,480: send data generation portion;
162,262,462: the write data sending part;
170,470: the clock acceptance division;
181,281,481: the write data acceptance division;
182,282,482: write data generation portion;
237: interrupt memory circuit;
250a, 350: the 1 clock generation portions;
251a, 351: the 1 clock sending parts;
250b: the 2nd clock generation portion;
251b: the 2nd clock sends acceptance division;
270a, 370:: the 1st clock acceptance division;
270b: the 2nd clock acceptance division;
337: the break detection counter;
384: the internal clocking count section;
385: the interrupt request identification part;
406a, 406b: differential transmission road;
491,439: the potential difference (PD) testing circuit;
463,483: interrupt request notice portion;
484: the interrupt request identification part.
Embodiment
Through accompanying drawing, embodiment of the present invention is described below.
(the 1st embodiment example)
(1) summary
Fig. 1 is the one-piece construction figure of the communication system of expression the 1st embodiment example of the present invention.In this communication system, be connected via transmission lines with transceiver as SD (Secure Digital) storage card 102 as the transceiver of host terminal 101.In transmission lines, comprise clock signal with transmission lines 105, control signal with transmission lines 106 and data-signal with transmission lines 107.Adopt clock signal with transmission lines 105, so as will to be used between host terminal 101 and the SD storage card 102 communication after the clock CLKH that states send SD storage card 102 to from host terminal 101.Adopt control signal with transmission lines 106, so as with data read, write etc. relevant order, after the interruptive command stated and replying of order sent reception between host terminal 101 and SD storage card 102.Adopt data-signal with transmission lines 107, so that between host terminal 101 and SD storage card 102, transmitting and receiving data.
The sequential chart of the appearance that the data when Fig. 2 reads for expression transmit.The communication system of this embodiment is the communication system of synchronous exchange (handshake) type; When the transmission of data; At first; The various command of read command (ReadCMD among Fig. 2) or write order etc. and reply (Res among Fig. 2) of this order sent reception between master terminal 101 and SD storage card 102 then, is carried out the transmission of data (DATA among Fig. 2).
In addition, in the communication system of this embodiment, be purpose with the transmission efficiency that improves data access, as shown in Figure 2, in the transmission of data, not only adopt data-signal with transmission lines 107, but also adopt control signal with transmission lines 106.Data are divided into a plurality of data slots and transmit, still, in the 1st data slot that transmits with transmission lines 106 via control signal, in the front and back of the 1st data slot, not additional header and footnote information.On the other hand, in the 2nd data slot that transmits with transmission lines 107 via data-signal, adding has heading message and footnote information.That is, data-signal with transmission lines 107 in, transmit the packet comprise heading message, the 2nd data slot and footnote information.The bit length of the 1st data slot is identical with the bit length of the 2nd data slot, and the 1st data slot and the 2nd data segment sync ground transmit.In addition, control signal is made as minimum with transmission lines 106 and data-signal with the transmission lines length of transmission lines 107 different and can ignores.
Here, heading message and footnote information are the information that is different from data slot.In heading message, comprise information adjustment usefulness, for example synchronization bit row and initial bits etc. of the time of reception of packet, in footnote information, comprise the end of representing packet, for example end is than the information of top grade.In addition, the information that comprises in heading message and the footnote information is not limited to these, also can comprise other various information.In addition, in data slot, also can comprise CRC (Cyclic Redundancy Check: CRC) than the information of transmission mistake top grade, that be used to detect each data slot.
In this embodiment; Be employed in control signal with in the transmission lines 106 in abutting connection with and transmit from the interval between the 1st data slot of transmitter side (being called the 1st time slot below); From the receiver side of data slot to transmitter side transmit look-at-me (Fig. 2, ITRPT (state after for example being read interruptive command).Owing in the 1st data slot, do not have additional header and footnote information, the 1st time slot defines through the interval of the 1st data slot of transmission formerly with the 1st data slot of transmission in the back.In addition, after the basic time slot stated through in the packet of the adjacency that comprises heading message and footnote information, the packet that transmits earlier defines with the interval of the packet that transmits in the back.
In addition, data-signal also can be not limited to 1 with transmission lines 107, and is provided with a plurality of.
(2) hardware configuration
Below once more through Fig. 1, the hardware configuration of master terminal 101 and SD storage card 102 is described.Host terminal 101 and storage card 102 through hardware configuration shown in Figure 1 with after the synergy of functional structure of the CPU110 shown in Figure 3 that states, the various functions of stating after the realization.
(2-1) host terminal
(a) CPU110: other RAM111, buffer 112, clamping oral area 113 and the I/O buffer etc. in the host terminal 101 are controlled.In addition, according to various programs realize host terminals 101 data read and write etc. after the various functions stated.
(b) RAM111: be stored in and SD storage card 102 between the various data that send to receive.
(c) buffer 112, clamping oral area 113: data the reading from RAM111 that the data of carrying out reading from SD storage card 102 write to the writing of RAM111, to SD storage card 102.
(d) I/O buffer: carry out order, reply, the input and output of the data of data etc.The I/O buffer comprises: data/order Output114a, data/reply Input114b, data Output114c, data I nput114d, driver 115a, receiver 115b, driver 115c and receiver 115d, they connect as illustrated in fig. 1.
(e) driver 116: with transmission lines 105, clock CLKH is sent to SD storage card 102 via clock signal.
(2-2) SD storage card
(a) CPU130: according to various programs, realize in the SD storage card 102 data read and write etc. after the various functions stated.
(b) Flash storer 131a: be stored in and host terminal 101 between the various data that send to receive.
(c) 131b of Flash memory interface portion, buffer 132, HPI portion 133: the data of carrying out reading from host terminal 101 are to the writing of Flash storer 131a, to the data that write the reading from Flash storer 131a of host terminal 101.
(d) I/O buffer: carry out order, reply, the input and output of the data of data etc.The I/O buffer comprises data/reply Output134a, data/order Input134b, data Output134c, data I nput134d, driver 135a, receiver 135b, driver 135c and receiver 135d, and they connect as illustrated in fig. 1.
(e) receiver 136: from host terminal 101, and receive clock CLKH.
(3) functional structure
Fig. 3 is the functional structure chart of CPU130 of CPU110 and the SD storage card 102 of host terminal 101.
The functional structure of the CPU of (3-1) host terminal
(a) clock generation portion, the clock sending part
Clock generation portion 150 produces the basic clock CLKH that is used for transmitting and receiving data between host terminal 101 and SD storage card 102.Because clock generation portion 150 is through clock CLKH; The various function portion of control CPU110, thus with clock CLKH send to clock sending part 151, constantly control part 152, order sending part 156, reply acceptance division 158, read data acceptance division 160 and write data sending part 162 etc.Clock sending part 151 with transmission lines 105, sends to SD storage card 102 via clock signal with clock CLKH.
(b) moment control part, the 1st time slot acquisition portion, parameter storage part
Parameter storage part 154 storage is as the communication specifications and the information of definite length for heading, footnote length and basic slot length.Here, length for heading and footnote length are by the title of amount of bits definition and the length of footnote.Basic slot length is by the interval between the packet of amount of bits definition, is the length of basic time slot.
The 1st time slot acquisition portion 153 is according to the length for heading that obtains from parameter storage part 154, footnote length and basic slot length, calculates and obtains interval, i.e. the 1st slot length between the 1st data slot.The 1st data slot transmits with transmission lines 106 via control signal from SD storage card 102 continuously.Here, the 1st slot length calculates through the mode of footnote length+basic slot length+length for heading.The 1st time slot acquisition portion 153 sends to order generation portion 155 with the 1st slot length.
In addition, constantly control part 152 and the 1st time slot acquisition portion 153 from after the write data acceptance division 160 stated, via data-signal with transmission lines 107, reception packet, and the bit length of the 2nd data slot that comprises in the heading message of acquisition packet.Here, the bit length of the 1st data slot is identical with the bit length of the 2nd data slot.The 1st time slot acquisition portion 153 counts the bit length and the 1st slot length of length for heading, the 2nd (or 1st) data slot according to clock CLKH successively, thus, holds the starting position of the 1st time slot.Then, the 1st time slot acquisition portion 153 starting positions with the 1st time slot send to order sending part 156.In addition, control part 152 is according to clock CLKH constantly, and bit length, footnote length and the basic slot length to length for heading, the 2nd (or 1st) data slot calculates successively, and count value is sent to read data acceptance division 160.
In addition, the starting position of time slot also can be from time slot acquisition portion 153, and obtains according to the count value from moment control part 152.
(c) order generation portion, the order sending part
Order sending part 155 produces the read command of the read data that is used for reading the image that is stored in SD storage card 102, sound etc.; Be used for writing the write order of data at SD storage card 102; With end the various command of reading interruptive command etc. of reading of read data from SD storage card 102.
Here, when reading, host terminal 101 via control signal with transmission lines 106 continuously with the 1st data slot, in addition via data-signal with transmission lines 107 continuously with packet, from SD storage card 102, receive read data.Reading interruptive command at this moment, is to send to SD storage card 102 and stop the order (look-at-me) of the transmission of read data with the 1st time slot between the 1st data slot of adjacency.The read data that order generation portion 155 for example judges, send from SD storage card 102 is to the situation of the host terminal 101 of the write latency of RAM111 etc., and judges whether to send and read interruptive command.Order generation portion 155 is when interruptive command is read in transmission, and the mode that is no more than the 1st slot length according to the bit length of reading interruptive command produces reads interruptive command.
Order sending part 156 with transmission lines 106, according to clock CLKH, sends to SD storage card 102 with the various command of read command and write order etc. via control signal.In addition, order sending part 156 is according to the starting position of the 1st time slot, sends and reads interruptive command according to can in the 1st time slot, sending the mode of reading interruptive command.
(d) reply acceptance division
Reply acceptance division 158 from SD storage card 102, receive replying of order that host terminal 101 has been sent.In addition, reply acceptance division 158 and judge whether from SD storage card 102, receive and write acknowledge interrupt, the signal of so-called busy (busy) is given write data sending part 162 with the N that has of the reception of writing acknowledge interrupt.
(e) read data acceptance division, read data generation portion
Read data acceptance division 160 receives the 1st data slot and packet from SD storage card 102 according to clock CLKH.Here, read data acceptance division 160 receives the 1st data slot via control signal with transmission lines 106, with transmission lines 107, receives packet via data-signal.In addition, read data acceptance division 160 is from moment control part 152, receive successively to length for heading, and the bit length of the 2nd (or 1st) data slot, footnote length is counted with basic slot length and the count value that obtains.According to this count value, under the situation of the 2nd data slot that read data acceptance division 160 can be in not losing the 1st data slot and packet, correctly receive.In addition, control signal transmits according to heading message and the footnote information of data-signal with the packet of transmission lines 107 with the 1st data slot of transmission lines 106, and the 2nd data segment sync of the 1st data slot and packet.
Read data generation portion 159 generates read data by the a plurality of the 1st and the 2nd data slot, and it is stored among the RAM111.
(f) send data generation portion, write data sending part
Send data generation portion 161 when producing write order, read the write data that is used for writing SD storage card 102, produce a plurality of the 1st data slots and packet from RAM111.The 1st data slot is additional header and footnote information and generate not.On the other hand, packet forms according to the mode that comprises heading message, the 2nd data slot and footnote information.In addition, the 1st data slot of synchronous driving is identical with the bit length of the 2nd data slot.
Write data sending part 162 with transmission lines 106, sends to SD storage card 102 with the 1st data fragments via control signal according to clock CLKH, with packet via data-signal with transmission lines 107, send to SD storage card 102.In addition, write data sending part 162 transmits control signal with the 1st data slot of transmission lines 106 according to the heading message and the footnote information of data-signal with the packet of transmission lines 107.So the 2nd data fragments of the 1st data fragments and packet is synchronous.
In addition, write data sending part 162 is from replying acceptance division 158, receives having or not of the reception of writing acknowledge interrupt.If receive and write acknowledge interrupt, then write data sending part 162 stops the transmission of the 1st data slot and packet.On the other hand, do not write acknowledge interrupt, then continue the transmission of the 1st data slot and packet, write acknowledge interrupt, then begin these transmissions once more if removed if receive.
Here, write data sending part 162 receives when writing acknowledge interrupt replying acceptance division 158, if send the 1st data slot and packet, then finishes the transmission of the 1st data slot and packet.Through the 1st data slot that finishes so to send when the reception of writing acknowledge interrupt and the transmission of packet, the 1st data slot in can preventing to send and the transmission of packet do not finish and ruined situation.
The functional structure of the CPU of (3-2) SD storage card
(a) clock acceptance division
Clock acceptance division 170 is from host terminal 101, receive clock CLKH.In addition, through from host terminal 101, the delay when the transmission of SD storage card 102, clock CLKH becomes card clock CLKS.Clock acceptance division 170 to moment control part 172, order acceptance division 177, reply sending part 178, read data sending part 179 and write data acceptance division 181 etc., send card clock CLKS.
(b) moment control part, the 1st time slot acquisition portion, parameter storage part
Parameter storage part 174 storage is as the communication specifications and the information of definite length for heading, footnote length and basic slot length.
The 1st time slot acquisition portion 173 is according to the length for heading that obtains from parameter storage part 174, footnote length and basic slot length, calculates and obtains as the interval between the 1st data slot of adjacency, i.e. the 1st slot length.The 1st time slot acquisition portion 173 sends to the generation portion 175 of replying with the 1st time slot.
In addition, constantly control part 172 and the 1st time slot acquisition portion 173 from after state write data acceptance division 181 and receive packets, and the bit length of the 2nd data slot that comprises in the heading message of acquisition packet.The 1st time slot acquisition portion 173 counts the bit length and the 1st slot length of length for heading, the 2nd (or 1st) data slot successively, and obtains the starting position of the 1st time slot according to card clock CLKS.Then, the 1st time slot acquisition portion 173 starting positions with the 1st time slot send to and reply sending part 178.In addition, the 1st data slot of synchronous driving is identical with the bit length of the 2nd data slot.
In addition, control part 172 is counted bit length, footnote length and the basic slot length of length for heading, the 2nd (or 1st) data slot successively, and count value is sent to write data acceptance division 181 according to card clock CLKS constantly.
(c) order acceptance division
Order acceptance division 177 with transmission lines 106, according to card clock CLKS, will comprise that the various command of reading interruptive command receives from host terminal 101 via control signal.
(d) reply generation portion, reply sending part
Replying generation portion 175 produces replying from the various command of host terminal 101.In addition, reply the generation of writing acknowledge interrupt that writes that generation portion 175 also ends write data.
Here, when writing, SD storage card 102 with transmission lines 106, receives the 1st data slot via control signal from host terminal 101 continuously, and receives write data.Writing acknowledge interrupt at this moment, is the 1st time slot that adopts between the 1st data slot of adjacency, the replying of transmission (look-at-me) that sends to host terminal 101 and stop write data.Reply generation portion 175 and for example judge the write data of sending from host terminal 101, and judge whether to send and write acknowledge interrupt to the situation write latency of Flash storer 131a etc., SD storage card 102.Reply generation portion 175 when acknowledge interrupt is write in transmission, the mode that is no more than the 1st slot length according to the bit length of writing acknowledge interrupt generates writes acknowledge interrupt.
Reply sending part 178 when ordering acceptance division 177, with transmission lines 106, will reply and send to host terminal 101 via control signal from host terminal 101 reception various commands.In addition, reply sending part 178 to writing acknowledge interrupt,, send according to can in the 1st time slot, sending the mode of writing acknowledge interrupt starting position according to the 1st time slot.And, write acknowledge interrupt and generate to writing before of Flash storer 131a, and send to host terminal 101 in write data.
In addition, as hereinafter described, when interruptive command is read in reception,, then reply sending part 178 after they send end, will reply and send to host terminal 101 if read data sending part 179 sends to host terminal 101 with the 1st data slot and packet.
(e) write data acceptance division, write data generation portion
Write data acceptance division 181 receives the 1st data slot and packet from host terminal 101 according to card clock CLKS.Here, write data acceptance division 181 receives the 1st data slot via control signal with transmission lines 106, receives packet via data-signal with transmission lines 107.In addition, write data acceptance division 181 receives the count value after successively bit length, footnote length and the basic slot length of length for heading, the 2nd (or 1st) data slot being counted from moment control part 172.According to this count value, correctly receive under the situation of the 2nd data slot that write data acceptance division 181 can be in not losing the 1st data segment and packet.In addition, the 1st data slot transmits according to the heading message and the footnote information of packet, the 2nd data segment sync of the 1st data slot and packet.
Write data generation portion 182 generates write data, and is stored among the Flash storer 131a according to the a plurality of the 1st and the 2nd data slot.
(f) send data generation portion, read data sending part
Send data generation portion 180 and ordering acceptance division 177 from host terminal 101, when receiving read command, 131a reads the read data that is used to send to host terminal 101 from the Flash storer, and generates a plurality of the 1st data slots and packet.Packet is generated as, and comprising: heading message, the 2nd data slot and footnote information.In addition, the 1st data slot of synchronous driving is identical with the bit number of the 2nd data slot.
Read data sending part 179 is according to card clock CLKS, with the 1st data slot via control signal with transmission lines 106, send to host terminal 101, with packet via data-signal with transmission lines 107, send to host terminal 101.In addition, read data sending part 179 sends the 1st data slot according to the heading message and the footnote information of packet.So, the 2nd data segment sync of the 1st data slot and packet.
In addition, read data sending part 179 if send the 1st data slot and packet, then finishes the transmission of these the 1st data slots and packet when the reception of reading interruptive command.Through the 1st data slot that finishes so to send when the reception of reading interruptive command and the transmission of packet, the 1st data slot in can preventing to send and the transmission of packet do not finish and ruined situation.
(4) flow process of handling
In the processing that is described below, clock CLKH from host terminal 101, is sent to SD storage card 102.
When read (4-1)
Fig. 4 is the process flow diagram of an instance of the flow process of processing communication system, when reading of this embodiment of expression.
Step S1, S2: the order generation portion 155 of host terminal 101 generates and is used for reading the read command of read data from SD storage card 102.The order sending part 156 of host terminal 101 with transmission lines 106, sends to SD storage card 102 (step S1) with read command via control signal.The order acceptance division 177 of SD storage card 102 receives read command (step S2).
The replying acceptance division 178 and will send to host terminal 101 (step S3) of step S3, S4:SD storage card 102 to the replying via control signal of read command with transmission lines 106.(step S4) replied in acceptance division 158 receptions of replying of host terminal 101.
The transmission data generation portion 180 of step S5, S6:SD storage card 102 from Flash storer 131a, reads read data corresponding to the reception of read command, generates the 1st data slot and packet.The read data sending part 179 of SD storage card 102 with the 1st data slot via control signal with transmission lines 106, send to host terminal 101, with packet via data-signal with transmission lines 107, send to host terminal 101 (step S5).The read data acceptance division 160 of host terminal 101 receives the 1st data slot and packet (step S6) from SD storage card 102.At this moment, the moment control part 152 of host terminal 101 is counted bit length, footnote length and the basic slot length of length for heading, the 2nd (or 1st) data slot successively, and count value is sent to read data acceptance division 160.
Then, read data generation portion 159 generates read data, and is stored among the RAM111 from the 1st and the 2nd data slot.
Step S7, S8: the transmission that the order generation portion 155 of read data generation portion 101 judges whether to read interruptive command if send (" being "), then generates and reads interruptive command (step S7).At this moment, the 1st slot length calculates according to length for heading, footnote length and basic slot length in the 1st time slot acquisition portion 153 of host terminal 101.The order generation portion 155 of host terminal 101 generates according to the mode that is no more than the 1st slot length and reads interruptive command (step S8).If the transmission (" denying ") of not reading interruptive command, then the read data acceptance division 160 of host terminal 101 also receives the 1st data slot and packet.
Step S9: the 1st time slot acquisition portion 153 of host terminal 101 counts the bit length and the 1st slot length of length for heading, the 2nd (or 1st) data slot successively, and obtains the starting position of the 1st time slot according to clock CLKH.
Step S10, S11: the order sending part 156 of host terminal 101,, will be read interruptive command and send to SD storage card 102 (step S10) according to the starting position of the 1st time slot with transmission lines 106 via control signal.The order acceptance division 177 of SD storage card 102 receives and reads interruptive command (step S11) from host terminal 101.
Step S12, S13:SD storage card 102 reply sending part 178 via control signal with transmission lines 106, will send to host terminal 101 (step S12) to reading replying of interruptive command.In addition, when the reception of reading interruptive command,, then after the transmission that finishes them, reply sending part 178 transmissions and reply if read data sending part 179 sends the 1st data slot and packet.
Host terminal 101 reply acceptance division 158 from SD storage card 102, receive and to reply (step S13).
The read data sending part 179 of step S14:SD storage card 102 stops the transmission of the 1st data slot and packet.
Then, if with read command once more from host terminal 101, send to SD storage card 102, then SD storage card 102 via control signal with transmission lines 106 and data-signal with transmission lines 107, begin the transmission of the 1st data slot and packet once more.
When (4-2) are write
Fig. 5 is the process flow diagram of an instance of the flow process of processing communication system, when writing of this embodiment of expression.
Step S21: the order generation portion 155 of host terminal 101 generates and sends the write order (step S21) that is used for writing at SD storage card 102 write data with order sending part 156.The order acceptance division 177 of SD storage card 102 receives write order (step S22).
The acceptance division 158 of replying of replying sending part 178 and host terminal 101 of step S23:SD storage card 102 sends reception replying write order.
Step S25, S26: the transmission data generation portion 161 of host terminal 101 and the reception of write data sending part 162 corresponding to write order, read write data from RAM111, generate the 1st data slot and packet, and send it to SD storage card 102 (step S25).The write data acceptance division 181 of SD storage card 102 receives the 1st data slot and packet (step S26) from host terminal 101.At this moment, the moment control part 172 of SD storage card 102 is counted bit length, footnote length and the basic slot length of length for heading, the 2nd (or 1st) data slot successively, and count value is sent to write data acceptance division 181.
Then, write data generation portion 182 generates write data according to the 1st data slot and packet, and it is stored among the Flash storer 131a.
Step S27, S28:SD storage card 102 reply the transmission that generation portion 175 judges whether to write acknowledge interrupt, if send (" being "), then generate and write acknowledge interrupt (step S27).At this moment, the 1st slot length calculates according to length for heading, footnote length and basic slot length in the 1st time slot acquisition portion 173 of SD storage card 102.The generation portion 175 of replying of SD storage card 102 generates according to the mode that is no more than the 1st time slot and writes acknowledge interrupt (step S28).If do not write the transmission (" denying ") of acknowledge interrupt, then the write data acceptance division 181 of SD storage card 102 also receives the 1st data slot and packet.
The 1st time slot acquisition portion 173 of step S29:SD storage card 102 counts the bit length and the 1st slot length of length for heading, the 2nd (or 1st) data slot successively, and obtains the starting position of the 1st time slot according to card clock CLKS.
Step S30:SD storage card 102 reply sending part 178 via control signal with transmission lines 106, according to the starting position of the 1st time slot, will write acknowledge interrupt and send to host terminal 101 (step S30).
Step S31, S32: the acceptance division 158 of replying of host terminal 101 judges whether to write acknowledge interrupt, be so-called busy (busy) signal (step S31) from 102 receptions of SD storage card.If do not receive and write acknowledge interrupt (" denying "), then at step S25, write data sending part 162 carries out the generation and the transmission of the 1st data slot and packet.
On the other hand, write acknowledge interrupt (" being ") if receive, then the write data sending part 162 of host terminal 101 stops via control signal with transmission lines 106 and the transmission (step S32) of data-signal with the 1st data slot and the packet of transmission lines 107.In addition, if remove the reception of writing acknowledge interrupt, then write data sending part 162 begins the generation and the transmission of the 1st data slot and packet once more at step S25.
(5) action effect
In the present invention, control signal is with the 1st data slot of transmission lines 106 not additional header and footnote information.Transmitter side adopts heading message and the footnote information of data-signal with the packet of transmission lines 107, makes the 2nd data segment sync of the 1st data slot and packet, and sends it to receiver side.At this moment, control signal with the 1st time slot between the 1st data slot of the adjacency of transmission lines 106 than data-signal with the interval between the packet of transmission lines 107, only grow the length of the bit length of footnote information and heading message.In the present invention, utilize the 1st time slot, send the look-at-me read interruptive command or to write acknowledge interrupt etc.Thus, for send read interruptive command or write acknowledge interrupt etc. and the other purposes that should guarantee during be unwanted, maybe can shorten other purposes during.So, can adopt the 1st time slot, the reduction of the transmission efficiency of the data that inhibition transmission look-at-me causes.In addition and since the 1st time slot for do not transmit data slot during, so can prevent the loss of data slot.
(6) variation
(6—1)
In describing in the above, in transmitting 1st data slot of control signal with transmission lines 106, not additional header and footnote information.But, also can any in heading message or the footnote information be additional in the 1st data slot.For example, if in the front of the 1st data slot additional header, then the interval of the heading message of the 1st data slot that transmits through the 1st data slot that transmits earlier and back of the 1st time slot defines.Perhaps, if in the back of the 1st data slot appended footnote information, then the 1st time slot is through the footnote information of the 1st data slot that transmits earlier, the gap of the 1st data slot that transmits with the back defines.Through adopting the 1st such time slot, can have surplus ground to guarantee time slot, and can suppress the reduction of transmission efficiency only according to length for heading or footnote length.
(6—2)
In SD storage card 102, data are handled according to 8 bit cells.So, be preferably 8 multiple by above-mentioned the 1st slot length that footnote length+basic slot length+length for heading calculates.
(6—3)
Before being in that transmission from the data of transmitter side finishes and receiver side can normally export to the state of transmitter side with order, for example, need t1 switching time of several clocks.In addition, before being in that transmission from the look-at-me of receiver side finishes and transmitter side can begin the state of transmission of data once more, for example, need t2 switching time of several clocks.So the 1st slot length is preferably and comprises this switching time of t1 and the bit length of t2.Promptly calculate as the 1st slot length at the interval between the 1st data slot length for heading according to the bit number of bit number+order of the footnote length of packet+switching time t1+switching time t2+ packet.In addition, as above-mentioned, the 1st slot length of expression also is preferably 8 multiple.
(6—4)
In describing in the above, to when transmitter side receives data, if receiver side will be read interruptive command or write the situation that acknowledge interrupt sends to transmitter side to be illustrated.In addition, this embodiment also can be suitable for during certain, making transmission lag when transmitter side receives data, or the various signals that send once more of designation data are when sending to transmitter side.
(6—5)
In describing in the above, packet forms according to the mode that comprises heading message, packet and footnote information successively, and still, their order is not limited to above-mentioned.
(6—6)
In describing in the above, this embodiment is illustrated with signal transmission line road and the data-signal communication system with transmission lines to having control.But this embodiment is also used transmission lines applicable to not having control signal, and only has the communication system of data-signal with transmission lines.For example, with in the transmission lines any, send not the 1st data slot of additional header and footnote information at data-signal.Then, be utilized between the 1st data slot of this data-signal transmission, send and read interruptive command and write acknowledge interrupt etc. with adjacency in the transmission lines.
(6—7)
In describing in the above, length for heading, footnote length and basic slot length are confirmed as communicating by letter specification.But, for example, also can be directed against each SD storage card, length for heading, footnote information are different with basic slot length and when host terminal 101 begins with communicating by letter of SD storage card 102, reciprocally obtain these information.
(6—8)
Control signal also can be 2 a pair of differential transmission lines with transmission lines 106 and data-signal with transmission lines 107.
(6—9)
In describing in the above, the structure that the bit length of each data slot is recorded in the heading message is illustrated.But, also can the bit length of each data slot be fixed by the communication specification.At this moment,, there is no need length for heading, obtain the bit length of data slot at any time according to the 2nd packet as long as in the parameter storage part, store the bit length of data slot.
(6—10)
Owing to preferably through the transmission of look-at-me, end the transmission of data immediately, preferred look-at-me adopts 1 the 1st data slot to send.But, for example also can be when the bit length of look-at-me surpasses the 1st slot length, look-at-me is divided into a plurality of, adopt a plurality of the 1st time slots to send.
(6—11)
In describing in the above; With the illustrative example mode to erasable (removable) memory devices, be that the SD storage card is illustrated; But; If be the clock of supplying with according to from host terminal, with read data send to host terminal such can be portable scratch pad memory equipment, then can adopt scope of the present invention not to be only limited to the SD storage card.For example, in addition, can enumerate mini-flash (registered trademark), smart media, multimedia card, memory stick etc.In addition, the storer that scratch pad memory equipment can load is not limited to flash memory, can enumerate the nonvolatile memory of MRAM, FeRAM etc.
(6—12)
The recording medium of the computer program of operation said method and the embodied on computer readable that records this program within the scope of the present invention in computing machine.,, for example can enumerate floppy disk, hard disk, CD-ROM, MO, DVD, DVD-ROM, DVD-RAM, BD (Blue-ray Disc), semiconductor memory here as the recording medium of embodied on computer readable.
Aforementioned calculation machine program is not limited to be stored in the above-mentioned recording medium, also can wait via the network that with electrical communication lines, wireless or wire communication line, internet is representative and transmit.
(the 2nd embodiment example)
Fig. 6, Fig. 7 are the one-piece construction figure of the communication system of the 1st routine embodiment of the 2nd embodiment of the present invention and the 2nd embodiment.In this communication system, be connected via transmission lines with transceiver as SD (Secure Digital) storage card 202 as the transceiver of host terminal 201.In transmission lines, comprise clock signal with transmission lines 205, control signal with transmission lines 206 and data-signal with transmission lines 207.Adopt this clock signal with transmission lines 205, so as will to be used between host terminal 201 and the SD storage card 202 communication after the 1st clock CLKH1 that states etc. from host terminal 201, send SD storage card 202 to.Adopt control signal with transmission lines 206,, send relevant order and the replying such as reading, write that receives with data order so that between host terminal 201 and SD storage card 202.Adopt data-signal with transmission lines 207,, send and receive the transmission reception of carrying out data so that between host terminal 201 and SD storage card 202.
The sequential chart of the appearance that the data when Fig. 8 reads for expression transmit.The communication system of this embodiment is the communication system of synchronous exchange (handshake) type; When the transmission of data; At first; The transmission of data (DATA among Fig. 8) is carried out in the various command of read command (ReadCMD among Fig. 8) or write order etc., interruptive command and the replying of order (Res among Fig. 8) sent between host terminal 201 and SD storage card 202 after the reception.
In addition, in the communication system of this embodiment, be purpose with the transmission efficiency that improves data access, as shown in Figure 8, in the transmission of data, not only adopt data-signal, but also adopt control signal with transmission lines 206 with transmission lines 207.Data are divided into a plurality of data slots and transmit, and in the data slot that transmits with transmission lines 207 with transmission lines 206 and data-signal via control signal, adding has heading message and footnote information.Promptly control signal with transmission lines 206 and data-signal with transmission lines 207 in transmission comprise the packet of heading message, data slot and footnote information.In addition, whole packets are made up of identical bit length.
Here, heading message and footnote information are the information that is different from data slot.Information adjustment usefulness, for example synchronization bit row and initial bits etc. that in heading message, comprise the time of reception of packet comprise the information end of representing packet, for example end bit etc. in footnote information.In addition, the information that comprises in heading message and the footnote information is not limited to these, also can comprise other various information.In addition, in data slot, also can comprise CRC (Cyclic Redundancy Check: CRC) than the information of transmission mistake top grade, that be used to detect each data slot.
In this embodiment, receiver side is used transmission lines via clock signal, and the 1st clock CLKH1 is sent to transmitter side.In addition, transmitter side sends to receiver side according to the 1st clock CLKH1 with packet.At this moment, receiver side stops the transmission of the 1st clock CLKH1 to transmitter side, so that stop the transmission from the packet of transmitter side.So transmitter side can not send to receiver side with packet.So, receiver side may command stopping from the transmission of the packet of transmitter side.
In addition, data-signal also can be not limited to 1 with transmission lines 207, and is provided with a plurality of.
Below, to as the instance of this embodiment, the 1st embodiment and the 2nd embodiment describe.
(the 1st embodiment)
(1) summary
The sequential chart of the appearance that the data when Fig. 9 is reading of expression the 1st embodiment transmit.In the 1st embodiment, host terminal 201 stops the transmission (with reference to A during Fig. 9 (stopping time slot)) of the 1st clock CLKH1.Thus, stop transmission from the packet of SD storage card 202.Then, via control signal with transmission lines 206, with look-at-me (ITRPT9 of Fig. 9 (and for example, for after state read interruptive command.)) from host terminal 201, send to SD storage card 202.In addition, with transmission lines 207, the 2nd clock CLKH2 that will be different from the 1st clock CLKH1 sends to SD storage card 202 via data-signal.SD storage card 202 receives interruptive command according to the 2nd clock CLKH2.
(2) hardware configuration
Adopt Fig. 6 below once more, the hardware configuration of host terminal 201 and SD storage card 202 is described.Host terminal 201 and SD storage card 202 through hardware configuration shown in Figure 6 with after the synergy of functional structure of the CPU210 shown in Figure 10 that states, the various functions of stating after the realization.
(2-1) host terminal
(a) CPU210: other RAM211, buffer 212, clamping oral area 231 and the I/O buffer etc. in the host terminal 201 are controlled.Then, according to various programs, realize in the host terminal 201 data read and write etc. after the various functions stated.
(b) RAM211: be stored in and SD storage card 202 between the various data that send to receive.
(c) buffer 212, clamping oral area 213: the data of carrying out reading from SD storage card 202 write, write data the reading from RAM211 the SD storage card 202 to RAM211's.
(d) I/O buffer: carry out order, reply, the input and output of the data of data etc.The I/O buffer comprises data/order Output214a, data/reply Input214b, data Output214c, data I nput214d, driver 215a, receiver 215b, driver 215c and receiver 215d, and they connect as illustrated in fig. 6.In addition, driver 215c with transmission lines 207, with the 2nd clock CLKH2, sends to SD storage card 202 via data-signal.
(e) driver 216: with transmission lines 205, clock CLKH1 is sent to SD storage card 202 via clock signal.
(2-2) SD storage card
(a) CPU230: according to various programs, realize in the SD storage card 202 data read and write etc. after the various functions stated.
(b) Flash storer 231a: be stored in and send the various data that receive between the host terminal 201.
(c) 231b of Flash memory interface portion, buffer 232, HPI portion 233: the data of carrying out reading from host terminal 201 are to the writing of Flash storer 231a, to the data that write the reading from the Flash memory interface 231b of portion of host terminal 201.
(d) I/O buffer: carry out order, reply, the input and output of the data of data etc.The I/O buffer comprises data/reply Output234a, data/order Imput234b, data Output234c, data I nput234d, driver 235a, receiver 235b, driver 235c and receiver 235d, and they connect as illustrated in fig. 6.In addition, receiver 235d with transmission lines 207, receives 2nd clock CLKH2 from host terminal 201 via data-signal.
(e) receiver 236: receive the 1st clock CLKH1 from host terminal 201.
(f) the interruption memory circuit 237 that interrupts memory circuit 237:SD storage card 202 with from control signal with transmission lines 206 receive the output line 235b1 of the receiver 235b of input, the output line 235d1 of the receiver 235d that imports with transmission lines 207 receptions from data-signal is connected.In addition, interruption memory circuit 237 will interrupt memory circuit Enable signal to be imported from CPU230, and the break detection signal is exported to CPU230.Here, control signal with transmission lines 206 and data-signal with transmission lines 207 in abutting connection with and in the packet that transmits, the packet that transmits earlier is called basic time slot (with reference to Fig. 9) with the interval of the packet of back transmission.In addition, stop the 1st clock CLKH1 supply during be called and stop time slot (with reference to Fig. 9).In stopping time slot, owing to do not have the supply of the 1st clock CLKH1, so stop packet from the transmission of SD storage card 202 to host terminal 201.Interrupt memory circuit Enable signal only basic time slot with stop time slot and produce active.So, interrupt memory circuit 237 and receive the input of interrupting memory circuit Enable signals, can be only basic time slot with stop time slot and move.
Through stopping the supply of the 1st clock CLKH1, packet stops to the transmission of host terminal 201.Then, as shown in Figure 9, stopping time slot (in Fig. 9; A during this time); Interrupt memory circuit 237 from host terminal 201, with transmission lines 207, receive the input of the 2nd clock CLKH2 via data-signal; And with transmission lines 206, receive the input of interruptive command (ITRPT among Fig. 9) via control signal.Interrupt 237 couples the 2nd clock CLKH2 of memory circuit and trigger, interruptive command is latched, and the break detection signal is exported to CPU230.In addition, through from host terminal 201, the delay when the transmission of SD storage card 202, the 2nd clock CLKH2 becomes the 2nd card clock CLKS2.So, in fact, interrupt memory circuit 237 according to the 2nd card clock CLKS2, receive interruptive command.
(3) functional structure
Figure 10 is the functional structure chart of CPU230 of CPU210 and the SD storage card 202 of host terminal 201.
The functional structure of the CPU of (3-1) host terminal
(a) the 1st clock generation portion, the 1st clock sending part
The 1st clock generation 250a of portion is created on the 1st basic clock CLKH1 that transmitting and receiving data is used between host terminal 201 and the SD storage card 202.The 1st clock generation 250a of portion is through the 1st clock CLKH1; The various function portion of control CPU210; Thus, to the 1st clock sending part 251a, constantly control part 252, order sending part 256, reply acceptance division 258, read data acceptance division 260 and write data sending part 262 etc. and send the 1st clock CLKH1.The 1st clock sending part 251a with transmission lines 205, sends to SD storage card 202 via clock signal with the 1st clock CLKH1.
In addition, the 1st clock sending part 251a stops the transmission of the 1st clock CLKH1 to SD storage card 202 through the control of order generation portion 255.
(b) the 2nd clock generation portion, the 2nd clock sending part
The 2nd clock generation 250b of portion generates the 2nd clock CLKH2 that is different from the 1st clock CLKH1.The 2nd clock sending part 251b with the 2nd clock CLKH2, with transmission lines 207, sends to SD storage card 202 via data-signal according to the control of order generation portion 255.
(c) moment control part, the parameter storage part
Constantly control part 252 from after the read data acceptance division 260 stated, receive packet, and the bit length of the data slot that obtains to comprise in the heading message of packet.Control part 252 is counted bit length, footnote length and the basic slot length of length for heading, data slot successively, and count value is sent to read data acceptance division 260 according to the 1st clock CLKH1 constantly.
(d) order generation portion, order sending part
Order generation portion 255 generate the read data that is used for reading the image that is stored in SD storage card 202, sound etc. read command, be used for SD storage card 202 write data write order, end the various command of reading interruptive command etc. of reading of read data from SD storage card 202.Order sending part 256 with transmission lines 206, according to the 1st clock CLKH1, sends to SD storage card 202 with the various command of read command and write order etc. via control signal.
Here, when reading, host terminal 201 is from SD storage card 202, via control signal with transmission lines 206 and data-signal with transmission lines 207, receive data slot continuously, and the reception read data.Reading interruptive command is the order (look-at-me) that sends to SD storage card 202 at this moment and stop the transmission of read data.The read data that order generation portion 255 for example judges, send from SD storage card 202 judges whether to send and reads interruptive command to the situation of the host terminal 201 of the write latency of RAM211 etc.In addition; Order generation portion 255 is if the transmission that judgement need be read interruptive command is then controlled the 1st clock sending part 251a, so that stop the transmission of the 1st clock CLKH1 to SD storage card 202; And control the 2nd clock sending part 251b, so that begin the transmission of the 2nd clock CLKH2 to SD storage card 202.In addition, after the transmission of the 1st clock CLKH1 stops, order sending part 256, will be read interruptive command and send to SD storage card 202 with transmission lines 206 via control signal.
(e) reply acceptance division
(f) read data acceptance division, read data generation portion
Read data acceptance division 260 via control signal with transmission lines 206 and data-signal with transmission lines 207, from SD storage card 202, according to the 1st clock CLKH1, the reception packet.In addition, read data acceptance division 260 receives the count value after successively bit length, footnote length and the basic slot length of length for heading, data slot being counted from moment control part 252.According to this count value, under the situation of the data slot that read data acceptance division 260 can be in lost data bag not, correctly receive.
The data slot of read data generation portion 259 in the packet generates read data, and it is stored among the RAM211.
(g) send data generation portion, write data sending part
Send data generation portion 261 if generate write order, then read the write data that is used for writing SD storage card 202, and generate a plurality of packets that comprise heading message, data slot and footnote information from RAM211.
Write data sending part 262 is according to the 1st clock CLKH1, via control signal with transmission lines 206 and data-signal with transmission lines 207, packet is sent to SD storage card 202.
The functional structure of the CPU of (3-2) SD storage card
(a) the 1st clock acceptance division, the 2nd clock acceptance division
The 1st clock acceptance division 270a with transmission lines 205, from host terminal 201, receives the 1st clock CLKH1 via clock signal.The 2nd clock acceptance division 270b with transmission lines 207, from master terminal 201, receives the 2nd clock CLKH2 via data-signal.In addition, through from the delay of host terminal 201 when the transmission of SD storage card 202, the 1st clock CLKH1 becomes the 1st card clock CLKS1, and the 2nd clock CLKH2 becomes the 2nd card clock CLKS2.The 1st clock acceptance division 270a sends to the 1st card clock CLKS1 moment control part 270, order acceptance division 277, replys sending part 278, read data sending part 279 and write data acceptance division 281 etc.The 2nd clock acceptance division 270b sends to order acceptance division 277 with the 2nd card clock CLKS2.
(b) moment control part, parameter storage part
Constantly control part 272 from after state write data acceptance division 281, receive packet, and the bit length of the data slot that obtains to comprise in the heading message of packet.Control part 272 is counted bit length, footnote length and the basic slot length of length for heading, data slot successively, and count value is sent to write data acceptance division 281 according to the 1st card clock CLKS1 constantly.
(c) order acceptance division
(d) receive generation portion, reply sending part
Replying generation portion 275 generates replying from the various command of host terminal 201.
Reply sending part 278,, then will reply, with transmission lines 206, send to host terminal 201 via control signal if order acceptance division 277 receives various command from host terminal 201.
(e) write data acceptance division, write data generation portion
Write data acceptance division 281 via control signal with transmission lines 206 and data-signal with transmission lines 207, according to the 1st card clock CLKS1, reception is from the packet of host terminal 201.In addition, write data acceptance division 281 receives the count value after successively bit length, footnote length and the basic slot length of length for heading, data slot being counted from moment control part 272.According to this count value, correctly receive under the situation of the data slot that write data acceptance division 281 can be in lost data bag not.
Write data generation portion 282 generates write data according to a plurality of data slots, and it is stored among the Flash storer 231a.
(f) send data generation portion, read data sending part
Send data generation portion 280,, then from Flash storer 231a, read the read data that is used to send to host terminal 201, and generate a plurality of packets if order acceptance division 277 receives read command from host terminal 201.Packet is generated as, and comprising: heading message, data slot and footnote information.
Read data sending part 279 is according to the 1st card clock CLKS1, with packet, via control signal with transmission lines 206 and data-signal with transmission lines 207, send to host terminal 201.
(4) flow process of handling
When the processing that begins to be described below,,, send to SD storage card 202 from host terminal 201 with the 1st clock CLKH1.
When read (4-1)
Figure 11 is the process flow diagram of an instance of the flow process of processing communication system, when writing of expression the 1st embodiment.
Step S1, S2: the order generation portion 255 of host terminal 201 generates and is used for reading the read command of read data from SD storage card 202.The order sending part 256 of host terminal 201 with transmission lines 206, sends to SD storage card 202 (step S1) with read command via control signal.The order acceptance division 277 of SD storage card 202 receives read command (step S2).
The replying sending part 278 and will with transmission lines 206, send to host terminal 201 (step S3) via control signal of step S3, S4:SD storage card 202 to the replying of read command.(step S4) replied in acceptance division 258 receptions of replying of SD storage card 201.
The transmission data generation portion 280 of step S5, S6:SD storage card 202 from Flash storer 231a, reads read data corresponding to the reception of read command, generates packet.The read data sending part 279 of SD storage card 202 via control signal with transmission lines 206 and data-signal with transmission lines 207, packet is sent to host terminal 201 (step S5).The read data acceptance division 260 of host terminal 201 receives packet (step S6) from SD storage card 202.At this moment, the moment control part 252 of host terminal 201 is counted bit length, footnote length and the basic slot length of length for heading, data slot successively, and count value is sent to read data acceptance division 260.
Then, read data generation portion 259 generates read data according to data slot, and it is stored among the RAM211.
Step S7, S8: the transmission that the order generation portion 255 of host terminal 201 judges whether to read interruptive command if send (" being "), then generates and reads interruptive command.If the transmission (" denying ") of not reading interruptive command, then the read data acceptance division 260 of host terminal 201 also receives packet.
Step S9～S11: the order generation portion 255 of host terminal 201 stops the transmission (step S9) of the 1st clock CLKH1 to SD storage card 202, and with the 2nd clock CLKH2 with read interruptive command and send to SD storage card 202 (step S10, S11).
The acceptance division 277 of replying of step S12, S13:SD storage card 202 blocks clock CLKS2 according to the 2nd, receives and reads interruptive command.
Step S14, S15:SD storage card 202 reply sending part 278 via control signal with transmission lines 206, will send to host terminal 201 (step S14) to reading replying of interruptive command.Host terminal 201 reply acceptance division 258 from SD storage card 202, receive and to reply (step S15).
The read data sending part 279 of step S16:SD storage card 202 stops the transmission (step S16) of packet.
Then, if with read command once more from host terminal 201, send to SD storage card 202, then SD storage card 202 via control signal with transmission lines 206 and data-signal with transmission lines 207, begin the transmission of packet once more.
(5) action effect
According to above-mentioned the 1st embodiment,, then stop from the transmission of the packet of SD storage card 202 if host terminal 201 stops the supply of the 1st clock CLKH1 to SD storage card 202.So, host terminal 201 stops the transmission of packet, will read interruptive command and the 2nd clock CLKH2 sends to SD storage card 202.That is, host terminal 201 can send and read interruptive command and the 2nd clock CLKH2 in time arbitrarily, needn't be between packet, be provided in advance sending read interruptive command and the 2nd clock CLKH2 during.Thus, the interval between packet can be shortened, the reduction of the transmission efficiency of data can be suppressed.In addition, after the transmission from the packet of SD storage card 202 stops,, send and read interruptive command and the 2nd clock via the transmission lines of transfer data packets.So, can prevent the loss of the data slot in the packet.
(the 2nd embodiment)
(1) summary
The sequential chart of the appearance that the data when Figure 12 is reading of expression the 2nd embodiment transmit.In the 2nd embodiment, host terminal 201 stops the transmission (with reference to A during Figure 12 (stopping time slot)) of the 1st clock CLKH1.Thus, from host terminal 201, notice is given SD storage card 202 with interrupt request (that states for example, reads interrupt request).At this moment, the transmission through the 1st clock CLKH1 stops, and stops from the transmission of the packet of SD storage card 202.
(2) hardware configuration
Below, utilize Fig. 7 once more, the hardware configuration of host terminal 201 and SD storage card 202 is described.Host terminal 201 and SD storage card 202 through hardware configuration shown in Figure 7 with after the synergy of functional structure of the CPU210 shown in Figure 13 that states, the various functions of stating after the realization.
(2-1) host terminal
In the hardware configuration of the host terminal 201 of the 2nd embodiment, identical with the host terminal 201 of the 1st embodiment except CPU210 only sends to the 1st clock CLKH1 the aspect of SD storage card 202, thus, it explains omission.
(2-2) SD storage card
The hardware configuration of the SD storage card 202 of the 2nd embodiment, identical with the SD storage card 202 of the 1st embodiment except break detection counter 337, thus, omit the explanation of the part beyond the break detection counter 337.
(3) functional structure
337 pairs of internal clockings of break detection counter are counted, and count value resets through the supply of the 1st clock CLKH1.That is,, will block clock CLKS and be input in the break detection counter 337, through this card clock CLKS, the count value of the internal clocking that resets based on the card clock CLKS of the 1st clock CLKH1.But, if the supply of the 1st clock CLKH1 stops, the count value of internal clocking that then do not reset, and carry out accumulated counts.
Be called during making that the supply of the 1st clock CLKH1 stops here, and stop time slot (A during in Figure 12, being called).In stopping time slot, owing to do not have the supply of the 1st clock CLKH1, so stop from the transmission of SD storage card 202 to the packet of host terminal 201.This length that stops time slot confirming in advance that according to the communication specification for example, when the communication beginning, from host terminal 201, notice is given SD storage card 202.In addition, with transmitting in the packet that signal 206 and data-signal transmit in abutting connection with ground in transmission lines 207, the packet that transmits earlier is called basic time slot with the interval of the packet of back transmission in control signal.
In Figure 12, during except stopping time slot, host terminal 201 is supplied with SD storage card 202 with the 1st clock CLKH1.So the count value of the internal clocking of break detection counter 337 is reset to " 0 " through the supply of the 1st clock CLKH1.On the other hand, stopping time slot, host terminal 201 stops the supply of the 1st clock CLKH1.So the count value of internal clocking adds up and greater than " 0 ".This count value sends to CPU230 as the break detection signal, and CPU230 is according to the situation of count value above setting, and identification host terminal 201 has been exported the situation of interrupt request.
(3) functional structure
Figure 13 is the functional structure chart of CPU230 of CPU210 and the SD storage card 202 of host terminal 201.In the 2nd embodiment, the 2nd clock generation 250b of portion, the 2nd clock sending part 251b, the 2nd clock acceptance division 270b are not set as the 1st embodiment.In addition, the label identical with the 1st embodiment is same functional structure, and be identical with the 1st embodiment except the functional structure of explanation below, omits the explanation to it thus.
The functional structure of the CPU of (3-1) host terminal
(a) the 1st clock generation portion, the 1st clock sending part
The 1st clock generation portion 350 and the 1st clock sending part 351 of the 2nd embodiment, identical with the structure of the 1st clock generation 250a of portion of the 1st embodiment and the 1st clock sending part 251a, omit explanation to it.In addition, the 1st clock sending part 351 stops the transmission of the 1st clock CLKH1 to SD storage card 202 through the control of interrupt request notice portion 356.
(b) order generation portion
Because the order generation portion 355 of the 2nd embodiment is the order generation portion 255 essentially identical structures with the 1st embodiment, so describe simply below.Order generation portion 355 generates the various command of read command, write order etc.In addition, order generation portion 355 does not produce the interruptive command of reading interruptive command etc.
(c) interrupt request notice portion
Interrupt request notice portion 356 is according to the situation of host terminal 201, and judging whether needs to interrupt the data transmission from SD storage card 202, and determines whether to stop the transmission of the 1st clock CLKH1.
Here, when reading, host terminal 201 receives packet continuously from SD storage card 202, and receives read data.Here; Interrupt request notice portion 356; For example judge the read data that sends from SD storage card 202 situation to the host terminal 201 of writing of RAM211 etc., and judge whether to stop the transmission from the read data of SD storage card 202, promptly whether host terminal 201 need read interrupt request.Then, interrupt request notice portion 356, if judgement need stop the transmission of read data, then according to only to stop the length of time slot (Fig. 9 during A), stop the 1st clock CLKH1 and control the 1st clock sending part 351 to the mode of the transmission of SD storage card 202.In addition, if through stopping time slot during A, then interrupt request notice portion 356 controls the 1st clock sending part 351 according to the mode of the transmission that begins the 1st clock CLKH1 once more.
The functional structure of the CPU of (3-2) SD storage card
(a) the 1st clock acceptance division
The 1st clock acceptance division 370 of the 2nd embodiment is identical with the structure of the 1st clock acceptance division 270a of the 1st embodiment, omits the explanation to it.
(b) internal clocking count section, interrupt request identification part
Internal clocking count section 384 produces internal clocking, and sends it to break detection counter 337.In addition, internal clocking is different from the clock based on the 1st clock CLKH1, card clock CLKS and the 1st clock CLKH1, the clock that neither produce from frequency division such as the 1st clock CLKH1.In addition, internal clocking count section 384 is in when beginning communication, from host terminal 201, the length of receiving slot (Fig. 9 during A), and according to this stop time slot during A and internal clocking, confirm setting.So-called setting is to be used to judge from the supply of host terminal 201 to the 1st clock CLKH1 of SD storage card 202, the judgment standard value that whether stops.
In addition, internal clocking count section 384 receives the break detection signal from interrupting detection counter 337, and detects the transmission whether host terminal 201 has stopped the 1st clock CLKH.The count value that in the break detection signal, comprises internal clocking here.This count value resets through the input that break detection counter 337 receives the 1st clock CLKH.So internal clocking count section 384 judges that whether count value surpasses the afore mentioned rules value, if surpass, judges that then the supply of the 1st clock CLKH1 stops.
Interrupt request identification part 385 receives the judged result of internal clocking count section 384.Here, if receive the judged result that the supply of the 1st clock CLKH1 stops, then 201 outputs of the 385 pairs of host terminals in interrupt request identification part are read interrupt request and are discerned.Interrupt request identification part 385 sends to recognition result read data sending part 379 and replys sending part 278.
(c) read data sending part
Read data sending part 379 is according to card clock CLKS, via control signal with transmission lines 206 and data-signal with transmission lines 207, packet is sent to host terminal 201.In addition, read data sending part 379 is in case from interrupt request identification part 385, and the recognition result of interrupt request is read in 201 outputs of reception host terminal, then stops the transmission of read data to host terminal 201.
(4) flow process of handling
When the processing that begins to describe below, the 1st clock CLKH1 from host terminal 201, is sent to SD storage card 202.
When read (4-1)
Figure 14 is the process flow diagram of an instance of the flow process of processing communication system, when writing of expression the 1st embodiment.
Step S1, S2: the order generation portion 355 of host terminal 201 generates the read command that is used for reading from SD storage card 202 read data.The order sending part 256 of host terminal 201 with read command, with transmission lines 206, sends to SD storage card 202 (step S1) via control signal.The order acceptance division 277 of SD storage card 202 receives read command (step S2).
Step S3, S4:SD storage card 202 reply sending part 278 via control signal with transmission lines 206, will send to host terminal 201 (step S3) to replying of read command.(step S4) replied in acceptance division 258 receptions of replying of host terminal 201.
The transmission data generation portion 280 of step S5, S6:SD storage card 202 from Flash storer 231a, reads read data according to the reception of read command, generates packet.The read data sending part 379 of SD storage card 202 via control signal with transmission lines 206 and data-signal with transmission lines 207, packet is sent to host terminal 201 (step S5).The read data acceptance division 260 of host terminal 201 receives packet (step S6) from SD storage card 202.At this moment, the moment control part 252 of host terminal 201 is counted bit length, footnote length and the basic slot length of length for heading, data slot successively, and count value is sent to read data acceptance division 260.
Then, read data generation portion 259 generates read data, and is stored among the RAM211 according to data slot.
Step S7, S8: the interrupt request notice portion 356 of host terminal 201 judges whether whether host terminal 201 need read interrupt request, promptly must stop the transmission from the read data of SD storage card 202.If read interrupt request (" being "), then interrupt request notice portion 356 controls the 1st clock sending part 351 according to the mode of the transmission that stops the 1st o'clock clockwise SD storage card 202.If do not read interrupt request (" denying "), then the read data acceptance division 260 of host terminal 201 also receives packet.
Here, host terminal 201 stops the length that time slot (Fig. 9 during A) of the transmission of the 1st clock CLKH1 to be confirmed according to the communication specification in advance, for example, when the communication beginning, gives SD storage card 202 from host terminal 201 notices.The internal clocking count section 384 of SD storage card 202 according to this stop time slot during A and internal clocking, confirm setting.
Step S9, S10: internal clocking count section 384 receives the break detection signal from interrupting detection counter 337.Whether the count value of the internal clocking that comprises in 384 pairs of interruptions of internal clocking count section detection signal is judged more than setting, and judged result is sent to interrupt request identification part 385.Interrupt request identification part 385, interrupt request is read in 201 outputs if count value more than setting, is then discerned host terminal.
Step S11～S13: in case through stopping time slot during A, then interrupt request notice portion 356 controls the 1st clock sending part 351 according to the mode of the transmission that begins the 1st clock CLKH1 once more.The 1st clock sending part 351 begins the transmission (step S11) of the 1st clock CLKH1 once more.SD storage card 202 reply sending part 278, if receive the recognition result that interrupt request is read in host terminal 201 outputs, then via control signal with transmission lines 206, will reply and send to host terminal 201 (step S12).Host terminal 201 reply acceptance division 258 from SD storage card 202, receive and to reply (step S13).
The read data sending part 379 of step S14:SD storage card 202 stops the transmission of packet.
Then, if once more with read command from host terminal 201, send to SD storage card 202, then SD storage card 202 via control signal with transmission lines 206 and data-signal with transmission lines 207, begin the transmission of packet once more.
(5) action effect
According to above-mentioned the 2nd embodiment, if host terminal 201 stops the supply of the 1st o'clock clockwise SD storage card 202, then the transmission from the packet of SD storage card 202 stops.So, the transmission of 201 pairs of packets of host terminal stops to control, thus, and SD storage card 202 identification interrupt request.That is, host terminal 201 can be in time arbitrarily, lets SD storage card 202 identification interrupt request, need not between packet, be provided in advance discerning interrupt request during.Thus, the interval between packet can be shortened, the reduction of the transmission efficiency of data can be suppressed.
(variation)
(1)
In the 1st embodiment of this embodiment, the 2nd embodiment, needn't be control signal with in transmission lines 206 and whole packets of data-signal, additional header and footnote information with transmission in the transmission lines 207.In the data slot that also can be only in transmission lines arbitrarily, transmits, additional header and footnote information, and in the transmission lines beyond it, only transmit data slot.At this moment, can only transmit data slot according to the heading message and the footnote information that transmit via transmission lines arbitrarily.
For example, control signal with transmission lines 206 in, transmit the 1st data slot, still, not in the front and back of the 1st data slot additional header and footnote information.On the other hand, data-signal with transmission lines 207 in, transmit the packet comprise heading message, the 2nd data slot and footnote information.The bit length of the 1st data slot is identical with the bit length of the 2nd data slot of packet.Utilize the heading message and the footnote information of packet, transmit the 1st data slot.At this moment, the 1st data slot and the 2nd data segment sync ground transmits.
(2)
In the above-mentioned the 1st and the 2nd embodiment, to from transmitter side, when receiving data, stop to be illustrated from the situation of the transmission of the packet of transmitter side.The the above-mentioned the 1st and the 2nd embodiment, in addition also applicable to, when transmitter side receives data, in the time of will sending to transmitter side with the various signals of redispatching that make transmission lag or designation data during certain.
(3)
In describing in the above, packet forms and comprises heading message, packet and footnote information successively, and still, these are not limited to said situation in proper order.
(4)
In describing in the above,, be illustrated with signal transmission line road and data-signal communication system with transmission lines to having control with regard to this embodiment.But this embodiment is also used the signal transmission line road applicable to not having control, and only has the communication system of data-signal with transmission lines.In addition, this embodiment can not only be applied to transmit via the data of a plurality of transmission lines, also transmits applicable to the data via 1 transmission lines.
(5)
In describing in the above, synchronously transmit with the packet that signal transmission line road and data-signal transmit in transmission lines, still, be not limited to the structure of synchronous driving in control.Can in each transmission lines, transmit according to the heading message and the footnote information of each packet.
(6)
In describing in the above, length for heading, footnote length and basic slot length are confirmed as communicating by letter specification.But, also can be for example, to each SD storage card, length for heading, footnote length is different with basic slot length and when host terminal 201 begins with communicating by letter of SD storage card 202, obtain these information each other.
(7)
Control also can be 2 a pair of differential transmission lines with signal transmission line road 206 and data-signal with transmission lines 207.
(8)
In describing in the above, the structure that the bit length of each data slot is recorded in the heading message is illustrated.But the bit length of each data slot also can be fixed through the communication specification.At this moment, can in the parameter storage part, store the bit length of data slot, needn't obtain the bit length of data slot at any time according to the length for heading of packet.
(9)
In the 1st embodiment of above-mentioned embodiment, owing to preferably through the transmission of interruptive command, end the transmission of data immediately, preferred interruptive command adopts 1 the 1st time slot to send.But, for example, when the bit length of interruptive command surpasses the 1st slot length, also can interruptive command be divided into a plurality ofly, and adopt a plurality of the 1st time slots to send.
(10)
In describing in the above; With the illustrative example mode to scratch pad memory equipment, be that the SD storage card is illustrated; But; If be the clock of supplying with according to from host terminal, with read data send to host terminal such can be portable scratch pad memory equipment, then can adopt scope of the present invention not to be only limited to the SD storage card.For example, can enumerate mini-flash (registered trademark), smart media, multimedia card, memory stick etc. in addition.In addition, the storer that scratch pad memory equipment can load is not limited to flash memory, can enumerate the nonvolatile memory of MRAM, FeRAM etc.
(11)
The recording medium of the computer program of operation said method and the embodied on computer readable that records this program within the scope of the present invention in computing machine.Floppy disk, hard disk, CD-ROM, MO, DVD, DVD-ROM, DVD-RAM, BD (Blue-ray Disc), semiconductor memory,, for example can have been enumerated here as the recording medium of embodied on computer readable.
Aforementioned calculation machine program is not limited to be stored in the above-mentioned recording medium, also can wait via the network that with electrical communication lines, wireless or wire communication line, internet is representative and transmit.
(the 3rd embodiment example)
(1) summary
Figure 15 is the one-piece construction figure of the communication system of the 3rd embodiment example of the present invention.In this communication system, be connected via 2 a pair of differential transmission lines with transceiver as SD (Secure Digita1) storage card 402 as the transceiver of host terminal 401.In the communication system of this embodiment, through after motional impedance circuit and the impedance circuit stated, in the pair of differential transmission lines, produce the potential difference (PD) of regulation, thereby transmit signal.Adopt the general differential load mode of current drive-type.In differential transmission line, comprise clock signal with transmission lines 405, control signal with transmission lines 406 and data-signal with transmission lines 407.Adopt clock signal with transmission lines 405, so as will to be used between host terminal 401 and the SD storage card 402 communication after the clock CLKH that states from host terminal 401, send SD storage card 402 to.Adopt control signal with transmission lines 406,, send relevant order and the replying such as reading, write that receives with data order so that between host terminal 401 and SD storage card 402.Adopt data-signal with transmission lines 407, so that between host terminal 401 and SD storage card 402, transmitting and receiving data.
The sequential chart of the appearance that the data when Figure 16 reads for expression transmit.The communication system of this embodiment is the communication system of synchronous exchange (handshake) type; When the transmission of data; At first, the various command of read command (ReadCMD among Figure 16) or write order etc. and to reply (Res among Figure 16) of this order is sent between host terminal 401 and SD storage card 402 and is received; Then, carry out the transmission of data (DATA among Figure 16).
In addition, in the communication system of this embodiment, be purpose with the transmission efficiency that improves data access, shown in figure 16, in the transmission of data, not only adopt data-signal with transmission lines 407, also adopt control signal with transmission lines 406.Data are divided into a plurality of data slots and transmit, and in the data slot that transmits with transmission lines 407 with transmission lines 406 and data-signal via control signal, adding has heading message and footnote information.That is, control signal with transmission lines 406 and data-signal with transmission lines 407 in, transmission comprises the packet of heading message, data slot and footnote information.In addition, whole packets are made up of same bits length.
Here, heading message and footnote information are the information that is different from data slot.In heading message, comprise information adjustment usefulness, for example synchronization bit row and initial bits etc. of the time of reception of packet, in footnote information, comprise the end of representing packet, for example, the end is than the information of top grade.In addition, the information that comprises in heading message and the footnote information is not limited to these, also can comprise other various information.In addition, in data slot, also can comprise CRC (Cyclic Redundancy Check: CRC) than the information of transmission mistake top grade, that be used to detect each data slot.
In this embodiment, control signal with transmission lines 406 in abutting connection with and between data slot in the packet that transmits, receiver side changes the signal amplitude of control signal with transmission lines 406.Thus, (that states after comprising reads interrupt request and writes interrupt request with interrupt request.) from receiver side, notice is given transmitter side.Here, the interval of the data slot of the packet that transmit the data slot of the interval between the data slot through the packet that transmits earlier and back defines, and in this embodiment below, is called expansion time slot (with reference to Figure 16).In addition, the basic time slot of stating after defines through the interval of packet that transmits earlier and the packet that transmits in the back.
In addition, data-signal also can be not limited to 1 with transmission lines 107, and is provided with a plurality of.
(2) hardware configuration
Below once more through Figure 15, the hardware configuration of master terminal 401 and SD storage card 402 is described.Master terminal 401 and storage card 402 through hardware configuration shown in Figure 15 with after the synergy of functional structure of the CPU410 shown in Figure 21 that states, the various functions of stating after the realization.
(2-1) host terminal
(a) CPU410: other RAM411, buffer 412, clamping oral area 413 and the I/O buffer etc. in the host terminal 401 are controlled.In addition, according to various programs, realize host terminal 401 data read and write etc. after the various functions stated.
(b) RAM411: send the various data that receive between storage and the SD storage card 402.
(c) buffer 412, clamping oral area 413: data the reading that the data of carrying out reading from SD storage card 402 write to the writing of RAM411, to SD storage card 402 from RAM411.
(d) I/O buffer: carry out order, reply, the input and output of the data of data etc.The I/O buffer comprises data/order Output414a, data/reply Input414b, data Output414c, data I nput414d, driver 415a, receiver 415b, driver 415c and receiver 415d, motional impedance circuit 417, impedance circuit 418 and potential difference (PD) testing circuit 419, and they connect as illustrated in fig. 1.Driver 415a, receiver 415b, driver 415c and receiver 415d are connected with transmission lines 407 with transmission lines 406 or data-signal with control signal as differential transmission line.
Motional impedance circuit 417 is connected respectively with 406b with 2 differential transmission road 406a of control signal with transmission lines 406.Motional impedance circuit 417 changes the signal amplitude of control signal with transmission lines 406 according to the interrupt request from CPU410.Figure 17 is the structural drawing of motional impedance circuit 417.Shown in figure 17, in motional impedance circuit 417, comprise assembly (set), the ON-OFF control circuit 417a of a plurality of on-off circuit SW and terminal resistance.In addition, ON-OFF control circuit 417a through after the interrupt request stated control, and be connected with the on-off circuit SW of regulation and the assembly of terminal resistance.Thus, the control signal that constitutes through differential transmission road 406a and 406b is with the signal amplitude value variation of transmission lines 406.For example, when motional impedance circuit 417 does not receive interrupt request, with impedance Control at 100 Ω, when receiving interrupt request, with impedance Control at 10 Ω.Through the driver 415a that is connected with transmission lines 406 with control signal, drive the steady current of 1mA here.If through the reception of interrupt request, impedance becomes 10 Ω from 100 Ω, then the control signal signal amplitude that uses transmission lines 406 from homophase current potential Vcom as benchmark ± undulate quantity of 100mV, become ± undulate quantity of 10mV.
Potential difference (PD) testing circuit 419 receives the input of the reference voltage V ref of regulation, detects the variation of control signal with the signal amplitude of transmission lines 406, and will export to CPU410 as the break detection signal of testing result.Figure 18 is the structural drawing of potential difference (PD) testing circuit.Potential difference (PD) testing circuit 419 comprises comparer 419a, 419b, OR circuit 419c.Comparer 419a, 419b are connected with 406b with 2 differential transmission road 406a of control signal with transmission lines 406 respectively, in addition, have imported reference voltage V ref and clock CLKH.Comparer 419a and 419b trigger clock CLKH, and the current potential that detects differential transmission road 406a and 406b is to be higher than, still to be lower than reference voltage V ref.When comparer 419a and 419b are higher than reference voltage V ref at the current potential of differential transmission road 406a and 406b, keep high level (High), when being lower than reference voltage V ref, keep low level (Low).Comparer 419a is connected with OR circuit 419c with 419b, and the value that is kept is input among the OR circuit 419c.In addition, the output of OR circuit 419c is input among the CPU410 as the break detection signal.Here, for example, the relative homophase current potential of reference voltage V ref Vcom, higher and be 50mV.Do not export interrupt request, control signal with the signal amplitude of transmission lines 406 during at SD storage card 402 in ± 100mV fluctuation; Any one current potential among differential transmission road 406a and the 406b is higher than reference voltage V ref, so OR circuit 419c is output as high level (High).On the other hand; SD storage card 402 output interrupt request, control signal with the signal amplitude of transmission lines 406 ± when 10mV fluctuates; Both current potential of differential transmission road 406a and 406b is lower than reference voltage V ref, and thus, OR circuit is output as low level (Low).Consequently; SD storage card 402 output interrupt request, control signal with the signal amplitude of transmission lines 406 from ± 100mV be reduced to ± during 10mV; The output of OR circuit 419c becomes low level (Low) from high level (High), and is input among the CPU410 as the break detection signal.CPU410 changes according to this of break detection signal, judges the having or not of output of the interrupt request of SD storage card 402.
(e) driver 416: via as the clock signal of differential transmission line with transmission lines 405, clock CLKH is sent to SD storage card 402.
(2-2) SD storage card
(a) CPU430: according to various programs, realize in the SD storage card 402 data read and write etc. after the various functions stated.
(b) Flash storer 431a: send the various data that receive between storage and the host terminal 401.
(c) 431b of Flash memory interface portion, buffer 432, HPI portion 433: the data of carrying out reading from host terminal 401 are to the writing of Flash storer 431a, to the data that write the reading from Flash storer 431a of host terminal 401.
(d) I/O buffer: carry out order, reply, the input and output of the data of data etc.The I/O buffer comprises data/reply Output434a, data/order Input434b, data Output434c, data I nput434d, driver 435a, receiver 435b, driver 435c and receiver 435d, motional impedance circuit 437, impedance circuit 438 and potential difference (PD) testing circuit 439, and they connect as illustrated in fig. 1.Driver 435a, receiver 435b, driver 435c and receiver 435d are connected with transmission lines 407 with transmission lines 406 or data-signal with control signal as differential transmission line.
Potential difference (PD) testing circuit 439 receives the input of the reference voltage V ref of regulation, detects the variation of control signal with the signal amplitude of transmission lines 406, and testing result is exported to CPU430.Because the structure of potential difference (PD) testing circuit 439 is except the aspect that clock CLKS is imported, identical with aforesaid Figure 18, the Therefore, omited is to its explanation (label is with reference in the bracket among Figure 18).If host terminal 401 output interrupt request, control signal are reduced to ± 10mV from ± 100mV with the signal amplitude of transmission lines 406; Then the output of the OR circuit 439c of potential difference (PD) testing circuit 439 becomes low level (Low) from high level (High), and is input among the CPU430 as the break detection signal.CPU430 changes according to this of break detection signal, judges the having or not of output of the interrupt request of host terminal 401.
(e) receiver 436, impedance circuit 440: impedance circuit 440 control is as the impedance with transmission lines 405 of the clock signal of differential transmission line, receiver 436 via clock signal with transmission lines 405, from host terminal 401, receive clock CLKH.
Action during the output of (2-3) interrupt request
In this embodiment, with packet from transmitter side, when receiver side transmits continuously, as the expansion time slot between data slot, receiver side output interrupt request.When SD storage card 402 received read datas, the situation of reading interrupt request with host terminal 401 outputs was an example at host terminal 401, and the action of motional impedance circuit 417 and potential difference (PD) testing circuit 439 is described.Control signal when Figure 19 reads interrupt request for expression output is with the process flow diagram of the state of the state of transmission lines 406 and break detection signal, and Figure 20 explains the key diagram of control signal with the output state of transmission lines 406, motional impedance circuit 417, potential difference (PD) testing circuit 439 and break detection signal etc.
(a) reception of packet
With reference to Figure 19, host terminal 401 with transmission lines 406, from SD storage card 402, receives the packet of read data via control signal.At this moment, host terminal 401 is not exported and is read interrupt request, and control signal is in the state of time t1～t7 shown in Figure 20 with the state of transmission lines 406.At this time t1～t7, motional impedance circuit 417 as noted earlier, with impedance Control at 100 Ω, control signal uses the signal amplitude of transmission lines 406 be with homophase current potential Vcom as benchmark ± 100mV.So in the potential difference (PD) testing circuit 439 of SD storage card 402, any one among comparer 439a, the 439b is output as high level (High (H)), be high level (High (H)) as the break detection signal of the output of OR circuit 439c.In addition, in Figure 19, control signal only is shown with transmission lines 406, still, even host terminal 401 via data-signal with transmission lines 407, still likewise receive packet.
(b) read the transmission of interrupt request
Then, interrupt request is read in the CPU410 of host terminal 401 output, so that stop the transmission from the packet of SD storage card 402.The control signal of this moment is equivalent to time t8, t9 shown in Figure 20 with the state of transmission lines 406.
In addition, the CPU410 of host terminal 401 is at the expansion time slot of control signal with transmission lines 406, and interrupt request is read in output.The expansion time slot is shown in figure 19, and the interval of the data slot of the packet that transmits through the data slot and the back of the packet that transmits earlier defines.Because in this embodiment; Adopt the differential load mode of current drive-type; So even the basic time slot (with reference to Figure 19) of the footnote information Ding Laiyi of the packet that transmits in footnote information through the packet that transmits earlier and back, control signal still is in any one the state in high level (High) or the low level (Low) with transmission lines 406.
Read the CPU410 of interrupt request, be input in the motional impedance circuit 417 of host terminal 401 from host terminal 401.Motional impedance circuit 417 through reading the reception of interrupt request, becomes 10 Ω with impedance from 100 Ω as aforementioned.At this moment, like Figure 19 and shown in Figure 20, the signal amplitude that control signal is used transmission lines 406 from homophase current potential Vcom as benchmark ± fluctuation (signal amplitude of 200mV) of 100mV, become ± fluctuation (signal amplitude of 20mV) of 10mV.So in the potential difference (PD) testing circuit 439 of SD storage card 402, both are output as low level (Low (L)) comparer 439a, 439b, be low level (Low (L)) as the break detection signal of the output of OR circuit 439c.The break detection signal that becomes low level (Low) from this high level (High) is input to the CPU430 of SD storage card 402.The CPU430 of SD storage card 402 is according to this break detection signal, host terminal 401 exported read interrupt request and discern, and will reply (Res among Figure 19) and send to host terminal 401.
(3) functional structure
Figure 21 is the functional structure chart of CPU430 of CPU410 and the SD storage card 402 of host terminal 401.
The functional structure of the CPU of (3-1) host terminal
(a) clock generation portion, clock sending part
(b) moment control part, time slot acquisition portion, parameter storage part
Time slot acquisition portion 453 is calculated and acquisition expansion slot length according to the length for heading that obtains from parameter storage part 454, footnote length and basic slot length.Here, the expansion slot length is calculated by footnote length+basic slot length+length for heading.Time slot acquisition portion 453 will expand the interrupt request notice portion 463 that states after slot length sends to.
In addition, constantly control part 452 and time slot acquisition portion 453 from after the read data acceptance division 460 stated, receive packet, and the bit length of the data slot that obtains to comprise in the heading message of packet.Time slot acquisition portion 453 counts the bit length and the expansion slot length of length for heading, data slot according to clock CLKH successively, thus, holds the starting position of expansion time slot.Then, time slot acquisition portion 453 sends to interrupt request notice portion 463 with the starting position of time slot.In addition, control part 452 is counted bit length, footnote length and the basic slot length of length for heading, data slot successively, and count value is sent to read data acceptance division 460 according to clock CLKH constantly.
In addition, the starting position of time slot can be according to being not to obtain from the count value of moment control part 452 from time slot acquisition portion 453 yet.
(c) order generation portion, order sending part
(d) reply acceptance division
(e) read data acceptance division, read data generation portion
Read data acceptance division 460 will be from the packet of SD storage card 402, via control signal with transmission lines 406 and data-signal with transmission lines 407, CLKH receives according to clock.In addition, read data acceptance division 460 receives the count value after successively bit length, footnote length and the basic slot length of length for heading, data slot being counted from moment control part 452.According to this count value, under the situation of the data slot that read data acceptance division 460 can be in lost data bag not, correctly receive.
In addition, even the packet that constitutes read data still is made up of identical bit length in transmission lines arbitrarily, synchronously transmit.Here, shown in figure 19, send packet heading message and footnote information during comprise expand time slot during.If during sending title with footnote during, interrupt request is read in 463 outputs of interrupt request notice portion, then has control signal to reduce, can't correctly receive the possibility of heading message and footnote information with the signal amplitude of transmission lines 406.But because as above-mentioned, even in transmission lines arbitrarily, packet still synchronously transmits, thus can from control signal with transmission lines 406 data-signal in addition with transmission lines 407 packet of transmission, reception heading message and footnote information.
Read data generation portion 459 generates read data from a plurality of packets, and it is stored among the RAM411.
(f) send data generation portion, write data sending part
Send data generation portion 461,,, read the write data that is used for writing SD storage card 402, and generate a plurality of packets that comprise heading message, data slot and footnote information then from RAM411 if generate write order.
Write data sending part 462 is according to clock CLKH, according in control signal with transmission lines 406 and data-signal with the synchronous mode of transmission lines 407, packet is sent to SD storage card 402.In addition, if write data sending part 462 from interrupt request identification part 464, receives the notice of writing interrupt request, then stops the transmission of packet to SD storage card 402.
(g) interrupt request notice portion, interrupt request identification part
Interrupt request notice portion 463 generates and ends the various interrupt request of reading interrupt request etc. of reading of read datas from SD storage card 402.Here, when reading, host terminal 401 is from SD storage card 402, via control signal with transmission lines 406 and data-signal with transmission lines 407, receive packet continuously, and the reception read data.Reading interrupt request is to utilize the interrupt request of expanding time slot and exporting and stop the transmission of read data at this moment.Interrupt request notice portion 463 for example judges, the read data that sends from SD storage card 402 is to the situation write latency of RAM411 etc., host terminal 401, and judges whether that output reads interrupt request.Interrupt request notice portion 463 definite signal amplitude values that changed according to the expansion slot length, are confirmed to change during the variation of signal amplitude.Then, interrupt request notice portion 463 according to fixed signal amplitude value with change during, the mode that is no more than the expansion slot length according to the bit length of reading interrupt request generates reads interrupt request.Then, interrupt request notice portion 463, will read interrupt request and export to motional impedance circuit 417 according to the starting position of expansion time slot according to can in the expansion time slot, exporting the mode of reading interrupt request.
Interrupt request identification part 464 receives the break detection signal of self-potential difference testing circuit 419, and judges whether SD storage card 402 has been exported and write interrupt request.Interrupt request identification part 464 will be write having or not of interrupt request and send to write data sending part 462.
The functional structure of the CPU of (3-2) SD storage card
(a) clock acceptance division
(b) moment control part, time slot acquisition portion, parameter storage part
Time slot acquisition portion 473 is calculated and acquisition expansion slot length according to the length for heading that obtains from parameter storage part 474, footnote length and basic slot length.Time slot acquisition portion 473 will expand slot length and send to interrupt request notice portion 483.
In addition, constantly control part 472 and time slot acquisition portion 473 from after the write data acceptance division 481 stated, receive packet, and the bit length of the data slot that obtains to comprise in the heading message of packet.Time slot acquisition portion 473 counts the bit length and the expansion slot length of length for heading, data slot according to card clock CLKS successively, thus, grasps the starting position of expansion time slot.Then, time slot acquisition portion 473 sends to interrupt request notice portion 483 with the starting position of time slot.In addition, control part 472 is counted bit length, footnote length and the basic slot length of length for heading, data slot successively, and count value is sent to write data acceptance division 481 according to card clock CLKS constantly.
In addition, the starting position of time slot can be according to being not from time slot acquisition portion 453 and obtain from the count value of moment control part 452 yet.
(c) order acceptance division
(d) reply generation portion, reply sending part
Replying generation portion 475 generates replying from the various command of host terminal 401.Reply sending part 478 via control signal with transmission lines 406, will reply and send to host terminal 401.
(e) write data acceptance division, write data generation portion
Write data acceptance division 481 receives the packet from host terminal 401 according to card clock CLKS.In addition, write data acceptance division 481 receives the count value after successively bit length, footnote length and the basic slot length of length for heading, data slot being counted from moment control part 472.Write data acceptance division 481 can be according to this count value, correctly receives under the situation of the data slot in lost data bag not.
In addition, still constituting, synchronously transmitting in the transmission lines arbitrarily even constitute the packet of write data with identical bit length.So,, still can receive heading message and footnote information from other data-signal with transmission lines 407 even write data acceptance division 481 can not receive under the situation of heading message and footnote information in transmission lines 406 in control signal.
Write data generation portion 482 generates write data from a plurality of packets, and it is stored among the Flash storer 431a.
(f) send data generation portion, read data sending part
Send data generation portion 480 at order acceptance division 477,, then read the read data that is used to send to host terminal 401, and generate a plurality of packets from Flash storer 431a if receive read command from host terminal 401.
Read data sending part 479, according to card clock CLKS, according to control signal with transmission lines 406 and data-signal with transmission lines 407 in synchronous mode, packet is sent to host terminal 401.In addition, read data sending part 479 in case receive the notice of reading interrupt request from interrupt request identification part 484, then stops the transmission of packet to host terminal 401.
(g) interrupt request notice portion, interrupt request identification part
Interrupt request notice portion 483 generates the various interrupt request of writing interrupt request etc. that write of ending from the write data of host terminal 401.Here, when writing, SD storage card 402 is from host terminal 401, via control signal with transmission lines 406 and data-signal with transmission lines 407, receive packet continuously, and the reception write data.Writing interrupt request is to utilize the interrupt request of expanding time slot and exporting and stop the transmission of write data at this moment.Interrupt request notice portion 483 for example judges, the write data of sending from host terminal 401 is to the state write latency of Flash storer 431a etc., SD storage card 402, and judges whether that output writes interrupt request.Interrupt request notice portion 483 definite signal amplitude values that changed according to the expansion slot length, are confirmed to change during the variation of signal amplitude.Then, interrupt request notice portion 483 according to fixed signal amplitude value with change during, the mode that is no more than the expansion slot length according to the bit length of writing interrupt request generates writes interrupt request.Then, interrupt request notice portion 483, will write interrupt request and export to motional impedance circuit 437 according to the starting position of expansion time slot according to can in the expansion time slot, exporting the mode of writing interrupt request.
Interrupt request identification part 484 receives the break detection signal of self-potential difference testing circuit 439, and judges whether host terminal 401 has been exported and read interrupt request.Interrupt request identification part 484 will be read having or not of interrupt request and sent to read data sending part 479.In addition, write interrupt request and before can write data being write Flash storer 431a, generate, and send to host terminal 401.
(4) flow process of handling
In the processing of explanation, clock CLKH from host terminal 401, is sent to SD storage card 402 below.
When read (4-1)
Figure 22 is the process flow diagram of an instance of the flow process of processing communication system, when reading of this embodiment of expression.
Step S1, S2: the order generation portion 455 of host terminal 401 generates the read command that is used for reading from SD storage card 402 read data.The order sending part 456 of host terminal 401 with transmission lines 406, sends to SD storage card 402 (step S1) with read command via control signal.The order acceptance division 477 of SD storage card 402 receives read command (step S2).
The replying sending part 478 and will with transmission lines 406, send to host terminal 401 (step S3) via control signal of step S3, S4:SD storage card 402 to the replying of read command.(step S4) replied in acceptance division 458 receptions of replying of host terminal 401.
The transmission data generation portion 480 of step S5, S6:SD storage card 402 is according to the reception of read command, and 431a reads read data from the Flash storer, generates packet.The read data sending part 479 of SD storage card 402, with packet, via control signal with transmission lines 406 and data-signal with transmission lines 407, send to host terminal 401 (step S5).The read data acceptance division 460 of host terminal 401 receives packet (step S6) from SD storage card 402.At this moment, the moment control part 452 of host terminal 401 is counted bit length, footnote length and the basic slot length of length for heading, data slot successively, and this count value is sent to read data acceptance division 460.
Then, read data generation portion 459 generates read data according to packet, and is stored among the RAM411.
Step S7, S8: the output that the interrupt request notice portion 463 of host terminal 401 judges whether to read interrupt request, if output (" being ") then generates and reads interrupt request (step S7).At this moment, the expansion slot length calculates according to length for heading, footnote length and basic slot length in the time slot acquisition portion 453 of host terminal 401.The interrupt request notice portion 463 of host terminal 401 generates according to the mode that is no more than the expansion slot length and reads interrupt request (step S8).If the output (" denying ") of reading interrupt request, then the read data acceptance division 460 of host terminal 401 also receives packet.
Step S9: the time slot acquisition portion 453 of host terminal 401 counts the bit length and the expansion slot length of length for heading, data slot successively, and obtains the starting position of expansion time slot according to clock CLKH.
Step S10, S11: the interrupt request notice portion 463 of host terminal 401 will read interrupt request and export to motional impedance circuit 417 (step S10) according to the starting position of expansion time slot.The interrupt request identification part 484 of SD storage card 402 has been exported the situation of reading interrupt request to host terminal 401 and has been discerned (step S11) according to the break detection signal that changes corresponding to the output of reading interrupt request.
Step S12, S13:SD storage card 402 reply sending part 478, if receive the recognition result that interrupt request is read in host terminal 401 outputs, then via control signal with transmission lines 406, will reply and send to host terminal 401 (step S12).Host terminal 401 reply acceptance division 458 from SD storage card 402, receive and to reply (step S13).
The read data sending part 479 of step S14:SD storage card 402 stops the transmission of packet.
Then, if with read command once more from host terminal 401, send to SD storage card 402, then SD storage card 402 via control signal with transmission lines 406 and data-signal with transmission lines 407, begin the transmission of packet once more.
When (4-2) are write
Figure 23 is the process flow diagram of an instance of the flow process of processing communication system, when writing of this embodiment.
Step S21, S22: the order generation portion 455 of host terminal 401 generates the write order that is used for writing at SD storage card 402 write data with order sending part 456, and transmission (step S21).The order acceptance division 477 of SD storage card 402 receives write order (step S22).
The acceptance division 458 of replying of replying sending part 478 and host terminal 401 of step S23:SD storage card 402 sends reception replying write order.
Step S25, S26: the transmission data generation portion 461 and the write data sending part 462 of host terminal 401, according to the generation of write order, read write data from RAM411, generate packet, and send it to SD storage card 402 (step S25).The write data acceptance division 481 of SD storage card 402 receives packet (step S26) from host terminal 401.At this moment, the moment control part 472 of SD storage card 402 is counted bit length, footnote length and the basic slot length of length for heading, data slot successively, and count value is sent to write data acceptance division 481.
Then, write data generation portion 482 generates write data from packet, and it is stored among the Flash storer 431a.
The interrupt request notice portion 483 of step S27, S28:SD storage card 402 judges whether to write the output of interrupt request, if output (" being ") then generates and writes interrupt request (step S27).At this moment, the expansion slot length calculates according to length for heading, footnote length and basic slot length in the time slot acquisition portion 473 of SD storage card 402.The interrupt request notice portion 483 of SD storage card 402 generates and writes interrupt request (step S28) according to the mode that is no more than the expansion slot length.If write the output (" denying ") of interrupt request, then the write data acceptance division 481 of SD storage card 402 also receives packet.
The time slot acquisition portion 473 of step S29:SD storage card 402 counts the bit length and the expansion slot length of length for heading, data slot successively, and obtains the starting position of expansion time slot according to card clock CLKS.
The interrupt request notice portion 483 of step S30:SD storage card 402 will write interrupt request and export to motional impedance circuit 437 according to the starting position of expansion time slot.
Step S31, S32: the interrupt request identification part 464 of host terminal 401 is according to the break detection signal that changes corresponding to the output of writing interrupt request, whether SD storage card 402 exported write interrupt request and judge (step S31).If interrupt request (" denying ") is not write in output, at step S25, write data sending part 462 carries out the generation and the transmission of packet.
On the other hand, if interrupt request (" being ") is write in output, then the write data sending part 462 of host terminal 401 stops the transmission (step S32) of packet.Then, if remove the output of writing interrupt request, then the write data sending part 462, at step S25, begin the generation and the transmission of packet once more.
(5) action effect
According to this embodiment, the variation of the signal amplitude that the transmitter side of data can be through keeping watch on transmission lines, identification is read interrupt request or is write the interrupt request of interrupt request etc. from receiver side.Here, receiver side changes signal amplitude between the data slot of adjacency, promptly expand time slot, the notice interrupt request.For the look-at-me that will be used to control transmitter side from receiver side; Send to transmitter side; During the bit length degree that need be equivalent to interruptive command between data slot, still, according to the Notification Method of interrupt request of the present invention; Needn't be between data slot, be provided with the bit length degree that is equivalent to interruptive command during.Thus, can suppress the reduction of the transmission efficiency of the data that cause by the notice interrupt request.In addition, do not transmit during the data slot owing to expand time slot, so can prevent the loss of data slot.
(6) variation
(6—1)
Potential difference (PD) testing circuit 419 and 439 shown in Figure 15 is not limited to circuit shown in Figure 180.Utilize Figure 24 and Figure 25, another structure of potential difference (PD) testing circuit is described.Figure 24 is another structural drawing of potential difference (PD) testing circuit, and Figure 25 is explanation control signal another key diagram with the output state of potential difference (PD) testing circuit 439 that constitutes among transmission lines 406, motional impedance circuit 417, Figure 24 and break detection signal.The structure of the potential difference (PD) testing circuit 439 of SD storage card 402 is identical with potential difference (PD) testing circuit 419, thus, omits the explanation to it.
Potential difference (PD) testing circuit 419 has: the 419d of integrating circuit portion, 419e; Comparer 419f, 419g; OR circuit 419h.The 419d of integrating circuit portion, 419e are connected with 406b with 2 differential transmission road 406a of control signal with transmission lines 406 respectively, in addition, have imported the homophase current potential Vcom and the reset signal of differential wave.The 419d of integrating circuit portion, 419e receive the input of the current potential of differential transmission road 406a and 406b, are benchmark with the homophase current potential Vcom of differential wave, calculate the integrated value of each stipulated time.In addition, the 419d of integrating circuit portion, 419e are whenever the edge moment of reset signal shown in Figure 25, and integrated value resets.Comparer 419f, integrated value that 419g will import and the reference potential Vref of certain regulation compare, if integrated value greater than Vref, is then exported high level (High (H)), if less than Vref, and output low level (Low (L)) then.Here; As stated, under the situation of the output that does not have interrupt request, control signal uses the signal amplitude of transmission lines 406 to be ± fluctuation of 100mV; And under the situation of output interrupt request, control signal uses the signal amplitude of transmission lines 406 to be ± fluctuation of 10mV.At this moment, when not exporting interrupt request, any integrated value among the 419d of integrating circuit portion, the 419e surpasses reference potential Vref, and any one among comparer 419f, the 419g keeps high level (High (H)).On the other hand, when output during interrupt request, the 419d of integrating circuit portion, both integrated values of 419e are lower than reference potential Vref, and both keep low level (Low (L)) comparer 419f, 419g.Consequently; If reception through interrupt request; Control signal is reduced to ± 10mV from ± 100mV with the signal amplitude of transmission lines 406, and then the output of OR circuit 419h becomes low level (Low (L)) from high level (High (H)), and is input among the CPU410 as the break detection signal.CPU410 is according to the variation of break detection signal, judges the having or not of output of interrupt request.
(6—2)
In this embodiment,, also can adopt Figure 26～structure shown in Figure 28 as notifying the method for using to transmitter side from the packet receiver side with interrupt request.Figure 26 is the one-piece construction of communication system of the variation of this embodiment example, and Figure 27 is the structural drawing of the structure of expression comparer, and Figure 28 is the key diagram of explanation control signal with the output state of transmission lines 406, comparer 441 and break detection signal etc.Because the structure beyond the comparer 441 is identical with Figure 15, the Therefore, omited explanation.In addition, because the structure of the comparer 443 of SD storage card 402 is identical with comparer 441, the Therefore, omited is to its explanation.
When host terminal 401 sent to SD storage card 402 with write data, the instance when enumerating SD storage card 402 output and writing interrupt request described the action of comparer 441.Host terminal 401 via control signal with transmission lines 406 and data-signal with transmission lines 407, continuously packet is sent to SD storage card 402.Here, the CPU430 of SD storage card 402, if will write interrupt request exports to motional impedance circuit 437, then as noted earlier, control signal reduces with the differential amplitude of transmission lines 406.At this moment, control signal is lower than the interpretable amplitude level of receiver 415b of the host terminal 401 that is connected with transmission lines 406 with control signal with the impedance of transmission lines 406.The receiver 415b of host terminal 401 can't the identification control signal with the differential wave of transmission lines 406, and can't export correct logic level.So, the output line 442b of receiver 415b be in high level (High) or the low level (Low) any one indeterminate state (with reference among Figure 28 * symbol).So, shown in figure 28, the output of comparer 441 shown in Figure 27, be that the value of break detection signal has to differ and is decided to be low level (Low (L)), and the situation of also promising high level (High (H)) (with reference to Figure 28 * symbol).In addition, when SD storage card 402 is not exported when writing interrupt request, the incoming line 442a of driver 415a is total for equating with the logic level of the output line 442b of receiver 415b.So, must be low level (Low) as the value of the break detection signal of the output of comparer 441.The CPU410 of host terminal 401 detects the variation of such break detection signal, thus, can discern SD storage card 402 and export the situation of writing interrupt request.
In addition, if carry out the comparer of above-mentioned such action, then be not limited to the structure of above-mentioned Figure 27.In addition, preferred comparer 441 shown in Figure 27 can be through realizing than potential difference (PD) testing circuit shown in Figure 15 419 less portion's areas.
(6—3)
In describing in the above, the expansion time slot that the interval of the data slot of the packet that transmits in the data slot and the back of the packet that transmits through elder generation defines, the change control signal is with the signal amplitude of transmission lines 406.But, between the packet that transmit packet that also can formerly transmit and back, be basic time slot between the heading message of the packet that transmits of the footnote information and the back of the packet that promptly formerly transmits, the change signal amplitude.Because during the transmission of heading message and footnote information, the variation that does not produce signal amplitude is so can stop the situation that can't correctly receive footnote information and heading message.In addition; In this embodiment, owing to adopt the differential load mode of current drive-type, so comprise control signal each transmission lines with transmission lines 406; Even basic time at interval during, still be in any one state in high level (High) or the low level (Low).
(6—4)
Needn't be that control signal is with transmitting road 406 and data-signal with in the whole packet that transmits in the transmission lines 407, additional header and footnote information.In the data slot that also can be only in transmission lines arbitrarily, be transmitted, attachment title information and footnote information, and in the transmission lines beyond it, only transmit data slot.At this moment, also can only transmit data slot according to the heading message and the footnote information that transmit via transmission lines arbitrarily.
For example, control signal with transmission lines 406 in, transmit the 1st data slot, still, not in the front and back of the 1st data slot additional header and footnote information.On the other hand, data-signal with transmission lines 407 in, transmit the packet comprise heading message, the 2nd data slot and footnote information.The bit length of the 1st data slot is identical with the bit length of the 2nd data slot of packet, and the 1st data slot and the transmission of the 2nd data segment sync ground.With the 1st data slot of the adjacency of transmission lines 406 and the 1st time slot between the 1st data slot, change the signal amplitude of control signal in control signal here, with transmission lines 406.So, even through during above-mentioned, exporting interrupt request, on one side still can suppress the reduction of the transmission efficiency of data, Yi Bian prevent the information loss of data slot.
Specifically, time slot acquisition portion 453 is according to the length for heading that obtains from parameter storage part 454, footnote length and basic slot length, calculates and obtains interval, i.e. the 1st slot length between the 1st data slot.Here, the 1st data slot length is calculated by footnote length+basic slot length+length for heading.Time slot acquisition portion 453 sends to interrupt request notice portion 463 with the 1st slot length.Interrupt request notice portion 463 definite signal amplitude values that changed, and according to the 1st slot length, confirm to change during the variation of signal amplitude.Then, interrupt request notice portion 463 generates based on fixed signal amplitude value with during changing and reads interrupt request.In addition, control part 452 with transmission lines 407, receives packet via data-signal from read data acceptance division 460 constantly, and the bit length of the 2nd data slot that comprises in the acquisition heading message.Time slot acquisition portion 453 counts the bit length and the 1st slot length of length for heading, the 2nd data slot successively, and obtains the starting position of the 1st time slot according to clock CLKH.Then, time slot acquisition portion 453 sends to interrupt request notice portion 463 with the starting position of the 1st time slot.Interrupt request notice portion 463 starting positions according to the 1st time slot will be read interrupt request and will be input in the motional impedance circuit 417, and change the signal amplitude of control signal with transmission lines 406.The potential difference (PD) testing circuit 439 of SD storage card 402 detects the variation of this signal amplitude, and the CPU430 of SD storage card 402 has exported the situation of reading interrupt request to host terminal 401 and discerned.
(6—5)
In describing in the above, control signal with transmission lines 406 and data-signal with transmission lines 407 in the packet of transmission synchronously transmit, still, be not limited to the structure of synchronous driving.As long as according to the heading message and the footnote information of each packet, in each transmission lines, transmit and get final product.
(6—6)
In describing, use transmission lines with transmission lines and data-signal in the above, carry out data and transmit via control signal.But this embodiment is not only applicable to transmit via the data of a plurality of transmission lines, is applicable to that also the data via 1 transmission lines transmit.
(6—7)
In describing in the above, when not exporting interrupt request, if the signal amplitude of transmission lines is big and the output interrupt request, then the signal amplitude of transmission lines reduces.But as long as can be according to the variation of signal amplitude, the identification interrupt request gets final product, and when not exporting interrupt request, if the signal amplitude of transmission lines is little and the output interrupt request, then the signal amplitude of transmission lines is also variable big.
(6—8)
In the SD storage card, data are handled according to 8 bit bases.So, preferably be 8 multiple by the above-mentioned expansion slot length that footnote length+basic slot length+length for heading is calculated.
(6—9)
Be in that transmission from the data of transmitter side finishes and the state of the exportable interrupt request of receiver side before, for example, need t1 switching time of several clocks.In addition, before the state that is in from the end of output of the interrupt request of receiver side and the transmission that transmitter side can begin data once more, for example, need t2 switching time of several clocks.So the preferred development slot length is to comprise this switching time of t1 and the bit length of t2.Promptly expanding slot length is calculated by the bit number of bit number+order of footnote length+switching time t1+switching time t2+ length for heading.Preferred this expansion slot length also is 8 multiple.
(6—10)
Above-mentioned interrupt request is not limited to read interrupt request and writes interrupt request, also can be make from the data transmission lag of other transmitter side certain during or the request of sending once more of designation data.
(6—11)
Describe in the above, packet forms and comprises heading message, packet and footnote information successively, and still, these are not limited to said situation in proper order.
(6—12)
In describing in the above, this embodiment is illustrated with signal transmission line road and the data-signal communication system with transmission lines to having control.But this embodiment is also used the signal transmission line road applicable to not having control, and only has the communication system of data-signal with transmission lines.
(6—13)
In describing in the above, length for heading, footnote length and basic slot length are confirmed as communicating by letter specification.But, also can be for example, to each SD storage card, length for heading, footnote length with basic time gap length different, and when host terminal begins with communicating by letter of SD storage card, obtain these information each other.
(6—14)
In describing in the above, the structure that the bit length of each data slot is recorded in the heading message is illustrated.But the bit length of each data slot also can fix through the communication specification.At this moment, as long as in the parameter storage part, store the bit length of data slot, needn't obtain the bit length of data slot at any time according to the length for heading of the 2nd packet.
(6—15)
In describing in the above; With the illustrative example mode SD storage card as scratch pad memory equipment is illustrated; But; If the clock through supplying with from host terminal, with read data send to host terminal can be portable scratch pad memory equipment, then can adopt scope of the present invention not to be only limited to the SD storage card.For example, in addition, can enumerate mini-flash (registered trademark), smart media, multimedia card, memory stick etc.In addition, the storer that scratch pad memory equipment can load is not limited to flash memory, can enumerate the nonvolatile memory of MRAM, FeRAM etc.
(6—16)
The recording medium of the computer program of operation said method and the embodied on computer readable that records this program within the scope of the present invention in computing machine.,, for example can enumerate floppy disk, hard disk, CD-ROM, MO, DVD, DVD-ROM, DVD-RAM, BD (Blue-ray Disc), semiconductor memory here as the recording medium of embodied on computer readable.
Aforementioned calculation machine program is not limited to be stored in the above-mentioned recording medium, also can transmit via network that is representative with electrical communication lines, wireless or wire communication line, internet etc.
Utilize possibility on the industry
The present invention is used in during data between the transceiver transmit, Yi Bian carry out the transmission of look-at-me, Yi Bian suppress the situation of reduction of the transmission efficiency of data.
Claims (24)
1. a method of communicating signals is characterized in that,
Receiver side and transmitter side are divided into a plurality of data slots via the transmission lines more than at least 2 with data, send reception,
Above-mentioned transmitter side is with the 1st data slot in above-mentioned a plurality of data slots; The 1st transmission lines via in the above-mentioned transmission lines transmits; To comprise heading message, transmit via the 2nd transmission lines beyond above-mentioned the 1st transmission lines by the packet of the 2nd data slot that forms with the identical bit length of above-mentioned the 1st data slot, footnote information; And synchronously transmit above-mentioned the 1st data slot and above-mentioned the 2nd data slot
At the time slot as the interval between above-mentioned the 1st data slot of the adjacency of above-mentioned the 1st transmission lines, the look-at-me that will be used to control above-mentioned transmitter side sends to above-mentioned transmitter side from above-mentioned receiver side.
2. method of communicating signals according to claim 1 is characterized in that,
In above-mentioned the 1st data slot, adding has any in heading message or the footnote information.
3. method of communicating signals according to claim 1 is characterized in that,
Above-mentioned look-at-me is the signal that is used to stop the transmission of above-mentioned the 1st data slot and above-mentioned packet.
4. a transceiver is characterized in that, comprising:
Data generation portion; It is divided into a plurality of data slots with data; According to above-mentioned a plurality of data slots, generate the 1st data slot, and generate comprise heading message, by the 2nd data slot that forms with the identical bit length of above-mentioned the 1st data slot and the packet of footnote information;
The data sending part; It makes above-mentioned the 1st data slot and above-mentioned the 2nd data segment sync; Above-mentioned the 1st data slot via the 1st transmission lines in the transmission lines more than at least 2, via the 2nd transmission lines beyond above-mentioned the 1st transmission lines, is sent to receiver side with above-mentioned packet; With
The look-at-me acceptance division, it receives look-at-me at the time slot as the interval between above-mentioned the 1st data slot of the adjacency of above-mentioned the 1st transmission lines from above-mentioned receiver side.
5. transceiver according to claim 4 is characterized in that,
It also comprises replys sending part, and it will be replied and send to above-mentioned receiver side according to the reception of above-mentioned look-at-me,
Above-mentioned look-at-me is the signal that is used to stop the transmission of above-mentioned the 1st data slot and above-mentioned packet,
When above-mentioned data sending part receives above-mentioned look-at-me at above-mentioned look-at-me acceptance division, above-mentioned the 1st data slot that finishes to send and the transmission of above-mentioned packet via the above-mentioned the 1st and the 2nd transmission lines,
The above-mentioned sending part of replying will be replied and send to above-mentioned receiver side after the transmission of above-mentioned the 1st data slot and above-mentioned packet is finished.
6. transceiver, it receives from transmitter side and is divided into the data that a plurality of data slots transmit, and it is characterized in that, comprising:
Data reception portion; It is with the 1st data slot in above-mentioned a plurality of data slots; Via the 1st transmission lines in the transmission lines more than at least 2; And will comprise heading message, by the 2nd data slot that forms with the identical bit length of above-mentioned the 1st data slot and the packet of footnote information, via the 2nd transmission lines beyond above-mentioned the 1st transmission lines, receive from above-mentioned transmitter side;
Time slot acquisition portion, it obtains the starting position and the slot length of time slot, and above-mentioned time slot is the interval between above-mentioned the 1st data slot of adjacency of above-mentioned the 1st transmission lines;
Look-at-me generation portion, its generation is used for controlling the look-at-me of above-mentioned transmitter side according to above-mentioned slot length; With
The look-at-me sending part, it according to the starting position of above-mentioned time slot, sends to above-mentioned transmitter side with above-mentioned look-at-me in above-mentioned time slot,
Above-mentioned the 1st data slot and above-mentioned the 2nd data segment sync ground transmit.
7. communication system, it comprises described transceiver of claim 4 and the described transceiver of claim 6.
8. a method of communicating signals is characterized in that,
Receiver side and transmitter side are divided into a plurality of data slots with data and send reception via transmission lines,
Above-mentioned receiver side with transmitting the road, sends to transmitter side with the 1st clock via clock signal,
Above-mentioned transmitter side with above-mentioned data slot, according to above-mentioned the 1st clock, sends to above-mentioned receiver side via above-mentioned transmission lines,
Above-mentioned receiver side stops the transmission of above-mentioned the 1st o'clock clockwise transmitter side, so that stop transmission from the above-mentioned data slot of above-mentioned transmitter side,
Above-mentioned transmission lines is at least more than 2,
Above-mentioned receiver side is after the transmission that stops above-mentioned the 1st o'clock clockwise transmitter side; To be used to control the look-at-me of above-mentioned transmitter side; The 1st transmission lines via in the above-mentioned transmission lines sends to above-mentioned transmitter side, and via the 2nd transmission lines beyond above-mentioned the 1st transmission lines; The 2nd clock is sent to above-mentioned transmitter side
Above-mentioned transmitter side receives above-mentioned look-at-me according to above-mentioned the 2nd clock.
9. method of communicating signals according to claim 8 is characterized in that,
Above-mentioned look-at-me is the signal that is used to stop the transmission of above-mentioned data slot.
10. method of communicating signals according to claim 8 is characterized in that,
Above-mentioned receiver side is exported interrupt request after the transmission that stops above-mentioned the 1st o'clock clockwise transmitter side, so that control above-mentioned transmitter side,
Above-mentioned transmitter side has the internal clocking that the reception of count value through above-mentioned the 1st clock resets, and stops to make the count value of above-mentioned internal clocking to surpass the situation of setting according to the transmission because of above-mentioned the 1st clock, discerns above-mentioned interrupt request.
11. method of communicating signals according to claim 10 is characterized in that,
Above-mentioned interrupt request is the request that is used to stop the transmission of above-mentioned data slot.
12. a transceiver is characterized in that, comprising:
Data generation portion, it is divided into a plurality of data slots that generate with data;
The 1st clock acceptance division, its 1st clock that will be used for above-mentioned data slot is sent to receiver side receives from above-mentioned receiver side via clock signal usefulness transmission road; With
The data sending part, it according to above-mentioned the 1st clock, sends to above-mentioned receiver side with above-mentioned data slot via transmission lines,
Stop transmission, and above-mentioned data sending part stops the transmission of above-mentioned data slot to above-mentioned receiver side from above-mentioned the 1st clock of above-mentioned receiver side,
Above-mentioned transmission lines is at least more than 2,
Above-mentioned data sending part according to above-mentioned the 1st clock, sends to above-mentioned receiver side with above-mentioned data slot via above-mentioned transmission lines more than at least 2,
The 2nd clock acceptance division, it from above-mentioned receiver side, receives the 2nd clock via the 2nd transmission lines in the above-mentioned transmission lines,
The look-at-me acceptance division, it via the 1st transmission lines in the above-mentioned transmission lines, receives the look-at-me that be used to control above-mentioned transmitter side from above-mentioned receiver side according to above-mentioned the 2nd clock,
After the transmission that stops from above-mentioned the 1st clock of above-mentioned receiver side, above-mentioned the 2nd clock acceptance division receives above-mentioned the 2nd clock, and above-mentioned look-at-me acceptance division receives above-mentioned look-at-me according to above-mentioned the 2nd clock.
13. transceiver according to claim 12 is characterized in that,
It also comprises replys sending part, and it will be replied and send to above-mentioned receiver side according to the reception of above-mentioned look-at-me.
14. transceiver according to claim 12 is characterized in that, also comprises:
The internal clocking count section, its count value to the internal clocking that the reception through above-mentioned the 1st clock resets is counted; With
The interrupt request identification part, it discerns the interrupt request of above-mentioned receiver side according to the count value of above-mentioned internal clocking,
Above-mentioned interrupt request identification part stops to make the situation of the count value of above-mentioned internal clocking above setting according to the transmission because of above-mentioned the 1st clock, discerns above-mentioned interrupt request.
15. transceiver according to claim 14 is characterized in that, also comprises replying sending part, it will be replied and send to above-mentioned receiver side according to the identification of above-mentioned interrupt request.
16. a transceiver, it is from transmitter side, and reception is divided into the data that a plurality of data slots transmit, and it is characterized in that, comprising:
The 1st clock sending part, it is used for above-mentioned transmitter side on the 1st clock of the transmission of above-mentioned data slot, with transmitting the road, sends to above-mentioned transmitter side via clock signal; With
Data reception portion, it according to above-mentioned the 1st clock, receives above-mentioned data slot from above-mentioned transmitter side via transmission lines,
Above-mentioned the 1st clock sending part stops the transmission of above-mentioned the 1st o'clock clockwise transmitter side, so that stop transmission from the above-mentioned data slot of above-mentioned transmitter side,
Above-mentioned transmission lines is at least more than 2,
Above-mentioned data reception portion according to above-mentioned the 1st clock, receives above-mentioned data slot from above-mentioned transmitter side via above-mentioned transmission lines more than at least 2,
This transceiver comprises:
Look-at-me generation portion, its generation is used to control the look-at-me of above-mentioned transmitter side;
The look-at-me sending part, it sends to above-mentioned transmitter side via the 1st transmission lines in the above-mentioned transmission lines with above-mentioned look-at-me; With
The 2nd clock sending part, it sends to above-mentioned transmitter side via the 2nd transmission lines in the above-mentioned transmission lines with the 2nd clock,
After above-mentioned the 1st clock sending part stops the transmission of above-mentioned the 1st o'clock clockwise transmitter side; Above-mentioned look-at-me sending part is via above-mentioned the 1st transmission lines; Above-mentioned look-at-me is sent to above-mentioned transmitter side; And above-mentioned the 2nd clock sending part sends to above-mentioned transmitter side via above-mentioned the 2nd transmission lines with the 2nd clock.
17. transceiver according to claim 16; It is characterized in that; Also comprise interrupt request notice portion, it is through controlling above-mentioned the 1st clock sending part according to the mode of the transmission that stops above-mentioned the 1st clock, and the interrupt request that will be used to control above-mentioned transmitter side is notified to above-mentioned transmitter side.
18. a communication system, it comprises described transceiver of claim 12 and the described transceiver of claim 16.
19. a method of communicating signals is characterized in that,
Receiver side and transmitter side are divided into a plurality of data slots with data and send reception via transmission lines,
Above-mentioned receiver side changes the signal amplitude of above-mentioned transmission lines between the above-mentioned data slot of the adjacency of above-mentioned transmission lines, notifies to above-mentioned transmitter side so that will be used to control the interrupt request of above-mentioned transmitter side,
Above-mentioned transmitter side detects the variation of above-mentioned signal amplitude.
20. method of communicating signals according to claim 19 is characterized in that,
Above-mentioned interrupt request is the request that is used to stop the transmission of above-mentioned data slot.
21. a transceiver is characterized in that, comprising:
Data generation portion, it is divided into a plurality of a plurality of data slots that generate with data;
The data sending part, it via transmission lines, sends to receiver side with above-mentioned data slot; With
The interrupt request identification part, it passes through between the above-mentioned data slot of the adjacency of above-mentioned transmission lines, to detect the variation of the signal amplitude of above-mentioned transmission lines, discerns the interrupt request from above-mentioned receiver side.
22. transceiver according to claim 21 is characterized in that, also comprises replying sending part, it will be replied and send to above-mentioned receiver side according to the identification of above-mentioned interrupt request.
23. a transceiver is characterized in that, comprising:
Data reception portion, its a plurality of data slots that partition data is formed receive from transmitter side via transmission lines; With
Interrupt request notice portion, it changes the signal amplitude of above-mentioned transmission lines through between the above-mentioned data slot of the adjacency of above-mentioned transmission lines, and the interrupt request that will be used to control above-mentioned transmitter side is notified to above-mentioned transmitter side.
24. a communication system, it comprises described transceiver of claim 21 and the described transceiver of claim 23.
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| JP2006121459 | 2006-04-26 | ||
| JP121459/2006 | 2006-04-26 | ||
| PCT/JP2007/053010 WO2007125670A1 (en) | 2006-04-26 | 2007-02-20 | Signal transmission method, transmission/reception device, and communication system |
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| CN101432762A CN101432762A (en) | 2009-05-13 |
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| EP (1) | EP2015230B1 (en) |
| JP (1) | JP4931912B2 (en) |
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- 2007-02-20 EP EP20070714536 patent/EP2015230B1/en not_active Ceased
- 2007-02-20 CN CN2007800149724A patent/CN101432762B/en not_active Expired - Fee Related
- 2007-02-20 WO PCT/JP2007/053010 patent/WO2007125670A1/en active Application Filing
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Also Published As
| Publication number | Publication date |
|---|---|
| EP2015230B1 (en) | 2014-04-02 |
| EP2015230A1 (en) | 2009-01-14 |
| EP2015230A4 (en) | 2012-02-22 |
| JP4931912B2 (en) | 2012-05-16 |
| US8099537B2 (en) | 2012-01-17 |
| TW200813730A (en) | 2008-03-16 |
| JPWO2007125670A1 (en) | 2009-09-10 |
| US20090290582A1 (en) | 2009-11-26 |
| WO2007125670A1 (en) | 2007-11-08 |
| CN101432762A (en) | 2009-05-13 |
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